Adriano Muscle

How to fuck an ass ?

Okay. Everybody makes jokes or faces at anal sex. The ultimateinsult in many cultures is for one to be invited to shove something upone's ass. A hefty minority of the world's population finds thisthought to be more or less pleasurable.I've been taking it up the ass and returning the favor since I was 14.I'm now 45, so I have a fair amount of experience with this joyfulproclivity. I wouldn't be doing it if it didn't feel good, okay?Anal sex is one of those things in life that you either like a lot oryou can't stand the thought of. A person's reaction to the subject iscolored a lot by how he or she feels about his or her body. (In orderto avoid tedious phrasing, I'm going to use the masculine pronounsfrom here on; but I want to make it clear that 'she' and 'her' areincluded except when speaking of male-only structures.)If you feel good about every part of your body, regarding no part ofit as unclean, "filthy" or shameful, then you have a lot less problemswith oddball pursuits whether you're considering them personally orjust being informed about what other folks like and do.In the male anatomy, it is possible to excite the prostate gland frombehind. Check out the placement of the rectum, bladder and prostatein an anatomical drawing of the region and you'll see why this ispossible. It's not for the embarrassment angle that a doctor puts acotted finger in your butt at a physical. He can tell a lot about thecondition of your digestive terminus and your genital-urinary systemby feeling around in there.There is a minority of women who like being butt-fucked. The ones whoreally go for this often say they get a better orgasm from it thanfrom the usual penetration. A straight male friend of mine wouldrather run it up a poop chute on a woman than into a snatch. Hecultivates several females who like getting it that way because hiswife won't cooperate. One of his girlfriends practically has to betied and gagged to keep neighbors from calling the police when shegets into it, screaming and thrashing the way she does. And Jose'couldn't be happier!A sage once said that there is no greater pleasure on earth thantaking a really good shit. I'd say he was a candidate for somebutt-fucking. The same sensation of that cable sliding out could behis over and over again if he'd just go bottom-up and get pumped.Dicks are bigger than turds, right? Not necessarily. Get turd-lockedon cheese sometime and you'll have a new appreciation for the joys ofchildbirth... And who wants to stick their dick into an asshole andget shit all over it? Nobody, that's who. And it isn't necessary forthat to happen, and it won't happen if the two know what they'redoing. A properly functioning rectum is empty unless you should

The penis

The penis is an important body part for sex that can be a source of pleasure and arousal, as well as anxiety and insecurity, for men and their partners alike.Concerns about the penis may include its size, the direction in which it points, as well as a host of sexual function issues, such as erectile ability and ejaculation. Many men wish that they had more control over some or all of these issues. But while some modifications can be helpful, concerns about the penis are often more a matter of perception than changing anything physically.It's important for men to be knowledgeable about what's normal for the penis and the role it plays in sexual satisfaction, so they can communicate with their healthcare providers, notice when there might be a problem, and feel comfortable discussing concerns or changes with a partner.Likewise, partners need to feel comfortable communicating what they do or don't enjoy about sex in relation to the penis. They also can greatly benefit, as can their sex life, when they develop comfort talking together about the penis, what's normal (or not), and what feels good . Many partners are afraid of offending a man, for instance if she wants to use a dildo or try other types of stimulation, or else couples may feel uncomfortable talking about the penis in general, whether good or bad. Good information about the penis can help open up a healthy dialogue and make both partners feel more satisfied in and out of the bedroom.Many men and women mistakenly believe that bigger is better when talking about penis size and a partner's sexual satisfaction. This perception may cause men a significant amount of anxiety about penis size and it can prevent both partners from reaping the sexual satisfaction they might otherwise experience.While some partners may enjoy larger-sized men, the truth is that penis size in and of itself is generally not the key to sexual satisfaction. For many women, the clitoris plays a primary role in orgasm ability, as does the area around and just inside the vaginal opening, which is full of nerve endings. As a result, grinding during intercourse and other types of external stimulation (such as hand or oral stimulation of a parter's genitals) are generally equally, if not more, satisfying than deep penetration. Women who enjoy G-spot stimulation also benefit from more shallow stimulation.It's common for men to notice changes to penis size as they age. Some of it is the result of changes that take place everywhere on the body, like a loss of firmness or less blood flow, and some of it is a function of weight gain and the tendency for men (and women) to become more sedentary as they age. Excess weight in the abdominal area can cause more of the penis to be inside the body. Regular exercise and a healthy diet can help minimize age-related changes to both the appearance of the penis and also sexual function.Men also may notice changes to the direction the penis points. In younger men, an erect penis often points closer to a 90 angle (straight up or towards a man's head). As a man ages, he may find that his penis points lower (towards his feet) during an erection.Even though many men worry about changes to their penis as a result of age, it's a common and normal experience. It certainly doesn't mean sex won't be as enjoyable or that a partner won't be accepting, since they're likely to be facing age-related changes, too. If anything, changes to the sexual anatomy and sexual function as a result of aging allow couples to explore sex in new ways and learn about each other's bodies all over again.

Male Orgasm

Speaking as a male, I can't think of anything. What's weird is that, for all the attention it receives, the male orgasm doesn't get talked about in much detail despite the fact that there can be a huge difference in intensity from one to the next. My guess is that the most reliable gauge of orgasmic intensity a lot of women have is the Groan-o-Meter: A big "ugh" from the big lug seems to indicate that, on this particular evening, his climax was a mindblower.With this information gap in mind, I set out to discover what, exactly, makes for the most bone-rattling, foundation-shaking male orgasms, and what women can do to encourage their arrival. I went straight to the experts -- a few sex therapists, and lots of men -- and, believe me, it was as if they (the guys at least) were just waiting for someone to ask. So here, finally, is everything you need to know about helping your guy have stronger, longer orgasms.One warning before we begin: Be prepared for surprises, and for seeming contradictions. It turns out that male orgasms are both as single-minded as they sometimes seem and at the same time a lot more complicated. As sensitive as men are to skill and technique, they're equally powered by mood, setting, and timing. The fun -- for him, for you -- is in mixing up the following strategies to see what will work tonight. So have at it.A good orgasm for a man is the sexual equivalent of a cold beer at the end of the workday: a satisfying reward for a job well done. The job in this case is pleasing you. A major part of the satisfaction men get from sex is the ego boost that results from making our partners go bonkers in bed.The point is that a lot of men won't allow themselves to savor their own orgasm until they've accomplished that goal. "Performing comes first; my orgasm comes second," says Will, 30, a bank administrator. "There are times when I just want to come, but basically my goal is for my wife to find every sexual encounter totally fulfilling."Sex therapists will tell you that although this approach is admirable -- better that men be too concerned with their partners' orgasms than not at all concerned -- it can nonetheless constitute a form of voluntary sensory deprivation. By reining in their passion, many men deprive themselves of the sexual abandon that produces the strongest orgasms. "Sex becomes a battle to make sure she has an orgasm, rather than a mutual sharing of enjoyment," says Barry McCarthy, Ph.D., a psychologist and sex therapist in Washington, DC, and coauthor of Male Sexual Awareness.The solution? Give your man the night off. Encourage him to focus on enjoying himself without worrying about taking care of you. There are two basic ways to go about this. One is to tell him, as your lovemaking heats up, that you want this one to be all for him, that tonight he should do whatever makes him feel good. The other is to encourage him to lie back passively and let himself be pleasured by you. Sex therapists say this is a better method, because it enables him to concentrate completely on what he's feeling, rather than on what he's doing. The same should go for you when he returns the favor another night: Ideally, both of you will regularly take turns teaching the other delightful lessons in the art of orgasmic appreciation.One caution: Michael Seiler, Ph.D., a marriage and sex therapist at the Phoenix Institiute in Chicago, says many men find it difficult to let go of control during sex. Don't be surprised, then, if it takes a while before your husband is comfortable turning the reins completely over to you. Be patient, but be firm. He'll learn to love it.

How many times should you ejaculate a day?

There is no limit to the amount of sperm your testicles can produce, or the amount of ejaculations you can have. Your body keeps producing sperm and the necessary fluids for semen continuously. Masturbating a few times in a day will not effect your long term fertility but you need to start asking yourself why you feel the need to masturbate so much, your psychological health may be in jeopardy.Actually this isn't entirely true. It takes about 2 months for a sperm to fully mature in the testicle and be ready for ejaculation. While your body can produce a seemingly endless supply of ejaculate, the more you do it, the less sperm it will actually contain. So if you are also trying to get a girl pregnant, then a lot of masturbation will actually be counter-productive because a man can really only have around 3 fertile ejaculations a week. Other than that, a lot of masturbation won't affect your long term fertility. If you stop for a few days, barring other factors, you will be fertile again.There's really no set limit, and would depend on the individual's stamina. The amount of fluid would quickly drop though.Some men can only last a couple rounds. and some burst really easily. But most men can last passed an hour even on their first round. For the woman's sake, it would only be worth making the guy cum up to 5 times if you like a lot of cum. Because for most men, since their fluids drop increasingly, they won't have a big load after 6 rounds. Some men are capable of such the extent tho. Personally, i can burst fat loads up to 4 times and it takes me an hour and a half to cum the first time during sex. Stamina is essential and most guys can last. but after every cum, it will take longer for the next cum to take place. for example. i would cum once in an hour and a half, and the second time during sex would take 2 hours. But different men have different abilities and uniqueness to their cumming skills. When men masturbate compared to sex, it is way different. in masturbation, a man can cum exceedingly up to even 20 times until he is tired, all within a day. but in sex a man would cum up to 6 times all within half a days worth or so. also very much depending on the skills of a woman and the position. if the position chosen suits that man specifically then he will cum more faster. also if the skills of the woman is very high then she can make a man cum a lot whenever. Some men burst easily, but most men have endurance.

All About Double Penetration

Sex positions are positions which people may adopt during or for the purpose of sexual intercourse or other sexual activities. Sexual acts are generally described by the positions the participants adopt in order to perform those acts. Though sexual intercourse generally involves the sexual penetration of the body of one person by another, or simply direct stimulation of the sex organ of one by another, a sex position may not necessarily involve penetration or direct stimulation, and may be non-penetrative instead.Three categories of intercourse are commonly practiced: vaginal intercourse, involving vaginal penetration by the penis; oral intercourse, involving oral caress of the penis or vagina with a partner's mouth; and anal intercourse, involving insertion into the anus by a partner's penis.[1] Sex acts may also involve other forms of genital stimulation, such as solo/mutual masturbation, which may involve rubbing or penetration by the use of fingers or hands or by a device (sex toy) such as a dildo or vibrator. There are numerous sex positions which the participants may adopt in any of these types of sexual intercourse or acts, creating an almost limitless number of sex positions. In addition to others, this list uses Alfred Kinsey's six primary positional categories.[2]The most used sex position is the missionary position. In this position, the participants face each other. The receiving partner lies on his/her back with legs apart, while the penetrating partner lies on top. This position and the following variations are primarily used for vaginal intercourse, although they can also be used for anal sex. * The penetrating partner stands in front of the receiving partner, whose legs dangle over the edge of a bed or some other platform like a table.[6] With the receiving partner's legs lifted towards the ceiling and resting against the penetrating partner, this is sometimes called the butterfly position. This can also be done as a kneeling position. * The receiving partner lies on his/her back. The penetrating partner stands and lifts the receiving partner's pelvis for penetration. A variant is for the receiving partner to rest his or her legs on the penetrating partner's shoulders. * The receiving partner lies on his/her back, legs pulled up straight and knees near to the head. The penetrating partner holds the receiving partner's legs and penetrates from above. * Similarly to the previous position, but the receiving partner's legs need not be straight and the penetrating partner wraps his or her arms around the receiving partner to push the legs as close as possible to the chest. Called the stopperage in Burton's translation of The Perfumed Garden.[7] * The coital alignment technique, a position where the woman is vaginally penetrated and the partner moves upward along the woman's body until the phallus is pointing down, the dorsal side of the phallus now rubbing against the clitoris. * The receiving partner crosses his/her feet behind his/her head (or at least puts his/her feet next to his/her ears), while lying on his/her back. The penetrating partner then holds the receiving partner tightly around each instep or ankle and lies on the receiving partner full-length. A variation is to have the receiving partner cross his/her ankles on his/her stomach, knees to shoulders, and then have the penetrating partner lie on the receiving partner's crossed ankles with his/her full weight. Called the Viennese oyster by The Joy of SexMost of these positions can be used for either vaginal or anal penetration. * Variants of the doggy style or doggy position include: * The receiving partner is on all fours with their torso horizontal. The penetrating partner inserts from behind. * In a variant on the doggy position, the receiving partner's torso is angled downwards. The penetrating partner can raise their own hips above those of the receiving partner for maximum penetration. * In another variant of the doggy position, the penetrating partner places their feet on each side of the receiving partner while keeping their knees bent and effectively raising up as high as possible while maintaining penetration. The penetrating partner's hands usually have to be placed on the receiving partner's back to keep from falling forward.[citation needed] * In a variant on the doggy position, the receiving partner kneels upright. The penetrating partner may gently pull the receiving partner's arms backwards at the wrists towards them.1st century AD depiction of 'spooning' * In the spoons position both partners lie on their same side facing in the same direction.[9] * The receiving partner lies on their side. The penetrating partner kneels and penetrates from behind. Alternatively, the penetrating partner can stand if the receiving partner is on a raised surface. * The receiving partner lies facing down, possibly with their legs spread. The penetrating partner lies on top of them.[10] The placement of a pillow beneath the receiving partner's hips can help increase stimulation in this position. * The receiving partner lies face down, knees together. The penetrating partner lies on top with spread legs. * The receiving partner lies on their side with their uppermost leg forward. The penetrating partner kneels astride the receiver's lowermost leMost of these positions can be used for either vaginal or anal penetration. * The penetrating partner sits on an area surface, legs outstretched. The receiving partner sits on top and wraps their legs around the penetrating partner. Called pounding on the spot in the Burton translation of The Perfumed Garden.[7] If the penetrator crosses their legs instead, it is called the lotus position.[12] This position can be combined with fondling of both the breasts and buttocks of the receiving partner and the buttocks of the penetrating partner, increasing the chances of both pleasure and orgasm in both partners. * The penetrating partner sits in a chair. The receiving partner straddles penetrating partner and sits, facing the penetrating partner, feet on floor. This is sometimes known as the lap dance. Other receiver-on-top variants can be adapted in this way as well. * The penetrating partner sits on a couch or in a chair that has armrests. The receiving partner sits in the penetrating partner's lap, perpendicular to penetrating partner, with his or her back against the armrest. * The penetrating partner kneels while the receiving partner lies on his or her back, ankles on each side of penetrating partner's shoulders

All about blowjob

Facesitting is a form of oral sex in which the receiver sits on the giver's face and pushes into it with his or her genitals.Oral sex can be performed by both partners at the same time in the so-called "sixty-nine" position. Spitting and/or swallowing of the ejaculatory fluids or giving a pearl necklace may cause different sexual stimulations. Autofellatio is a possible but rare variant; autocunnilingus may also be possible for women with extremely flexible spines.An act of group sex restricted to one woman giving oral sex to several men is referred to as a gangsuck, blowbang or lineup, all derivatives of the slang expression gang bang for group sex. Bukkake and gokkun may also involve oral sex, though not necessarily.Oral sex may be practiced by people of all sexual orientations. In heterosexual contexts, oral sex is used by some couples as a method of contraception and may be chosen as an alternative to vaginal intercourse for this reason. Oral sex alone cannot result in pregnancy.[1] Under any normal circumstances, there is no way for sperm from the penis to enter the uterus and Fallopian tubes to fertilize an egg; in humans, there is no connection between the gastrointestinal system and the reproductive tract.[nb 1] Ingested sperm will be killed and broken down by acid in the stomach and proteins in the small intestine. The breakdown products will be absorbed as a negligible quantity of nutrients. However, the act does carry a potential risk of pregnancy if semen from the man comes in contact with the vaginal area indirectly. This can occur if the semen in the ejaculate is carried on the fingers, hands, or other body parts; and comes in contact with the vaginal area. It is therefore still necessary to exercise caution when having oral sex to prevent pregnancy.Oral sexual activities are not necessarily effective methods of preventing sexually transmitted diseases (STDs), although some forms of STD are believed to be less easily spread in this way, and oral sex has been recommended as a form of safe sex.[2][3][4] In the United States, no barrier methods for use during oral sex have been evaluated as effective by the Food and Drug Administration.[5] However, a barrier protection like a condom for fellatio or dental dam for cunnilingus can offer some protection from contact when practicing oral sex.[6] Oral contact should be limited to the protected areas. A makeshift dental dam can be made out of a condom[7] or a latex or nitrile glove.[8] However using a real dental dam is seen as preferable because real dental dams cover a larger area, avoid accidents caused by "slipping" outside the covered area, and avoid the risk that makeshift versions may be accidentally damaged or poked with the scissors during the cutting procedure. Plastic wrap may also be used as a barrier during oral sex, but there exists no conclusive scientific research regarding how effective it may or may not be at preventing disease transmission.[9] Certain kinds of plastic wrap are manufactured to be microwaveable and are designed to have pores that open when heated, but there also exists no scientific research on what effect, if any, this has on disease transmission when used during oral sex.[10] Some people complain that the thickness of the plastic dulls sensation.A report issued in September 2005 by the National Center for Health Statistics was the basis of an article in the September 26, 2005, issue of Time magazine. The report comes from the results of a computer-administered survey of over 12,000 Americans between the ages of 15 and 44, and states that over half the teenagers questioned have had oral sex. While some headlines have interpreted this as evidence that oral sex among teenagers is "on the rise", this was the first comprehensive study of its kind to examine the matter.[11]Preserving virginityAmong heterosexuals in particular, oral sex is often regarded as "third base" and is usually viewed as preserving male or female virginity, due to its non-procreative nature. This is especially exercised in the case of female virginity, as oral sex (which can be penetrative or non-penetrative) may leave the hymen intact. Among sexually active heterosexuals, the concept of "technical virginity", which includes oral sex, anal sex, mutual masturbation and other non-penetrative acts, is conceived as resting solely on penile-vaginal penetration.[12][13][14][15][16][17] Since the early 1990s, "technical virginity" has been popular among teenagers.[12][17] Additionally, gay males may consider oral sex to be "technical virginity" in comparison to anal penetration.[18]Chlamydia, human papillomavirus (HPV), gonorrhea, herpes, hepatitis (multiple strains), and other sexually transmitted diseases (STDs)--including HIV--can be transmitted through oral sex.[19] While the exact risk of transmitting HIV through oral sex is unknown, it is generally thought to be lower than other sex practices.[20] The risks from most of these types of infections are generally considered far less than those associated with vaginal or anal sex.[2][3][4]If the receiving partner has wounds or open sores on their genitals, or if the giving partner has wounds or open sores on or in their mouth, or bleeding gums, this poses an increased risk of STD transmission. Brushing the teeth, flossing, undergoing dental work, or eating crunchy foods such as chips relatively soon before or after giving oral sex can also increase the risk of transmission, because all of these activities can cause small scratches in the lining of the mouth. These wounds, even when they are microscopic, increase the chances of contracting STDs that can be transmitted orally under these conditions. Such contact can also lead to more mundane infections from common bacteria and viruses found in, around, and secreted from the genital regions.Cultural attitudes towards oral sex range from disgust to reverence. It has been considered taboo, or at least frowned upon, in many cultures and parts of the world.[28] In Ancient Rome, fellatio was considered profoundly taboo.[29] Sexual acts were generally seen through the prism of submission and control. This is apparent in the two Latin words for the act: irrumare (to penetrate orally), and fellare (to be penetrated orally). Under this system, it was considered to be abhorrent for a male to perform fellatio, since that would mean that he was penetrated (controlled), whereas receiving fellatio from a woman or another man of lower social status (such as a slave or debtor) was not humiliating. The Romans regarded oral sex as being far more shameful than, for example, anal sex - known practitioners were supposed to have foul breath and were often unwelcome as guests at a dinner table.[29] In contrast, in Chinese Taoism, cunnilingus is revered as a spiritually fulfilling practice that is believed to enhance longevity.[30] There is some anthropological evidence for cunnilingus as a widespread activity amongst Australian aboriginals.[31] In modern Western culture, oral sex is widely practiced among adolescents[11] and adults.People give various reasons for their dislike of oral sex. Some say that since it does not lead to procreation, it is therefore unnatural.[32] Others believe that it is a humiliating or unclean practice (an opinion that is, at least in some cases, connected with the symbolism attached to different parts of the body).[33] This has been more or less the case in Christian and Sub-Saharan African cultures and other modern religions.While commonly believed that all women who have sex with women engage in oral sex, some dislike it due to not liking the experience or due to psychological or social factors, such as finding it unclean.[34][35][36][37] Other lesbian or bisexual women believe that it is a necessity or largely defines lesbian sexual activity, attributing lesbian or bisexual women who dislike oral sex as a problem.[36][37] Often, lesbian couples are likely to define a woman's dislike of oral sex as a problem more than heterosexual couples are, and commonly seek therapy to overcome inhibitions regarding oral sex.[36]Oral sex has been observed in the animal kingdom among many species.[38][39][40] The desire to explore something with the mouth is easy to observe as an intuitive and natural impulse. It has been suggested that there is an evolutionary advantage due to the tendency of primates, non-primates and humans to have oral sex.

Anal Sex

The abundance of nerve endings in the anal region and rectum makes anal sex pleasurable for many men and women.[17] "The opening and closing of the anus is controlled by the internal and external sphincter muscles (the most important muscles when engaging in anal sex). The sphincter muscle is a sensitive membrane with many nerve endings and thus the source of pleasure or pain."[18]In a male receiving partner, being penetrated can produce a pleasurable sensation due to the inserted penis rubbing or brushing against the prostate (also known as the "male G-Spot", "P-Spot" or "A-Spot") through the anal wall.[7][19] This can result in pleasurable sensations and can lead to an orgasm in some cases.[7][8] "For some men, prostate stimulation produces an orgasm that they describe as 'deeper', more global and intense, longer-lasting, and associated with greater feelings of ecstasy than orgasm elicited by penile stimulation only."[8] The prostate is located next to the rectum and is the larger, more developed[20] male homologue to the Skene's glands (which are believed to be connected to the female G-Spot).[21]Research shows that most women (70-80%) achieve orgasm only through direct clitoral stimulation.[22][23][24][25] The clitoris surrounds the vagina somewhat like a horseshoe and its tip or glans alone has more than 8,000 sensory nerve endings, more than any other part of the human body.[26] In addition to nerve endings present within the anus and rectum, women may find anal stimulation pleasurable due to the "legs" of the clitoris which extend along the vaginal lips back to the anus.[27] The Grfenberg spot, or G-Spot - a small area behind the female pubic bone surrounding the urethra and accessible through the anterior wall of the vagina - is considered to have legs in relation to the clitoris.[8][28][29] Besides their accessibility, orgasm by stimulation of the clitoris or G-Spot through anal penetration is made possible because a thin membrane is all that separates the vaginal cavity from the rectal cavity, allowing for indirect stimulation.[6][8][9][10] Only a small percentage of women are able to orgasm from this type of stimulation alone.[10] Direct stimulation of the clitoris, G-Spot, or both, during anal sex can help some women to enjoy the experience and reach orgasm.[9][30]In pornography, anal sex is often presented as routine and painless, but according to Go Ask Alice! and other researchers, anal sex occurs "much less frequently" than other sexual behaviors and can be painful if not performed with care.[1][3][31] The increase of anal activity among heterosexuals has been linked to the increase in anal pornography,[1] and the association with dominance and taboo make anal sex appealing to people of all sexual orientations.[32][33] Moreover, the opening of the anus (its sphincter) is usually tighter than a vagina, which can yield greater tactile pleasure for the man via his penis.[9][32]While each person's sphincter muscles react to penetration differently, the anal sphincter in general has delicate tissue that can tear, and the rectal mucous membrane provides insufficient lubrication for sexual penetration. Researchers say adequate lubrication, relaxation, and communication between sexual partners are crucial to avoid pain or damage to the anus.[1][12][16][34] Ensuring that the anal area is clean and the bowel is empty (for both aesthetics and practicality) is also recommendedSome men may enjoy being the insertive partner in anal sex because the anal sphincter is usually tighter than a vagina, which can yield greater tactile pleasure for the man via his penis.[9][32] The attitude of women towards being the receptive partner in this practice is diverse: while some consider it painful or uncomfortable, others find it pleasurable and some even prefer it to vaginal intercourse.[9][35] Unlike the clitoris or anus, the vaginal walls "contain relatively few nerve endings, making intense sexual stimulation, pleasure, and orgasm from vaginal-only penetration unlikely" and "it's generally only the lower third of the vagina that has enough nerve endings to feel any stimulation at all from a penis, finger, toy, or other penetrative object".[36] Vaginal intercourse may, however, promote a satisfying feeling of fullness or closeness with a sexual partner.[37]In a study of heterosexual anal sex - (8/2010 (n=214)) - female participants stated that stimulation to multiple erogenous zones simultaneously (the clitoris, the G-Spot, the anus, or other erogenous zones) enabled them to enjoy anal intercourse with much less discomfort compared to anal penetration by itself. When accompanied by one or more of the other stimuli, women were able to orgasm and those who did reported that an orgasm during anal sex is more of a full-body experience than an orgasm from clitoral stimulation alone.[30]Anal sex is held to carry a very low risk of unwanted pregnancy when not accompanied with vaginal intercourse, as anal intercourse cannot lead to pregnancy unless sperm is somehow transported to the vaginal opening in the process; in some populations, this activity is frequently used as a means of contraception, often in the absence of a condom.[38]The risk to the woman is greater than the risk to the man during male-to-female anal intercourse.[39] The risk of injury to the receptive partner due to anal intercourse is many times higher than that due to vaginal sex,[40] and the risk of transmission of HIV is higher for anal sex than for vaginal sex.[41] Experts caution couples engaging in this practice to use protection, such as condoms, to stop the transmission of STDs.[1] Additionally, if the man moves from anal sex immediately to vaginal sex without a condom or without changing it, infections can arise in the vagina due to bacteria present within the anus; this also applies to the use of sex toysIn 1992, a study conducted by the U.S. Centers for Disease Control and Prevention found that only 26% of men 18 to 59 and 20% of women 18 to 59 had engaged in heterosexual anal sex; a similar 2005 survey (also conducted by the U.S. Centers for Disease Control and Prevention) found a rising incidence of anal sex relations in the American heterosexual population. The survey showed that 40% of men and 35% of women between 25 and 44 had engaged in heterosexual anal sex.[48] In terms of overall numbers of survey respondents, seven times as many women as gay men said that they engaged in anal intercourse, with this figure reflecting the larger heterosexual population size.[49] According to a study from the National Survey of Sexual Health and Behavior (NSSHB) that was authored by Dr. Debby Herbenick and other researchers, although anal intercourse is reported by fewer women than other partnered sex behaviors, partnered women in the age groups between 18-49 are significantly more likely to report having anal sex in the past 90 days.[50] As of 2011, this survey provides the most up to date data about anal sex at the population level.In a 2007 report entitled Prevalence and Correlates of Heterosexual Anal and Oral Sex in Adolescents and Adults in the United States, published in the Journal of Infectious Disease, a national survey of Family Growth found that 34% men and 30% women reported ever participating in heterosexual anal sex. The percentage of participants reporting heterosexual anal sex was significantly higher among 20- to 24-year-olds and peaked among 30- to 34-year-olds.[51][52] Another survey in, 2008, focused on a much younger demographic of teenagers and young adults, aged 15-21. It found that 16% of 1350 surveyed had had this type of sex in the previous 3 months, with condoms being used 29% of the time.[53] However, given the subject matter, the survey hypothesized the prevalence was probably underestimated.In 2009, Kimberly R. McBride published a clinical report in The Journal of Sex Research which stated that changing norms may affect the frequency of heterosexual anal sex behaviors and suggests that there is a role for the exotic in the sexual repertoires of some heterosexuals" "[F]or a certain number of heterosexuals, anal intercourse is pleasurable, exciting, and perhaps considered more intimate than vaginal sex...". McBride and her colleagues investigated the prevalence of non-intercourse anal sex behaviors among a sample of men (n=1,299) and women (n=1,919) compared to anal intercourse experience and found that 51% of men and 43% of women had participated in at least one act of oral-anal sex, manual-anal sex, or anal sex toy use.[51][54] McBride and Janssen found that the majority of men (n=631) and women (n=856) who reported heterosexual anal intercourse in the past 12 months were in exclusive, monogamous relationships: 69% and 73%, respectively.[51][54]Figures for prevalence can vary amongst different demographics, regions, and nationalities. A 2001 French survey of five hundred female respondents concluded that a total of 29% had engaged in this practice, with one third of these confirming to have enjoyed the experience.[55] In contrast, in a 1999 South Korean survey of 586 women, 3.5% of respondents reported having had this type of sex.[56]Figures for the prevalence of sexual behavior can also fluctuate over time. Edward O. Laumann's 1992 survey, reported in The Social Organization of Sexuality: Sexual Practices in the United States, found that about 20% of heterosexuals had engaged in male-to-female anal sex. Sex researcher Alfred Kinsey, working in the 1940s, had found that number to be closer to 40% at the time. More recently, a researcher from the University of British Columbia in 2005 put the number of heterosexuals who have engaged in this practice at between 30% and 50%.[57] According to Columbia University's health website Go Ask Alice!: "Studies indicate that about 25 percent of heterosexual couples have had anal sex at least once, and 10 percent regularly have anal penetration.Pegging is a sexual practice in which a woman penetrates a man's anus with a strap-on dildo.[58] Advice columnist Dan Savage wrote that he believes all men should try pegging at least once, as it may introduce them to a new enjoyable sexual activity and illuminate them to the receiver's perspective in sex.[59] A few instructional movies and books have emerged in recent years, including Bend Over Boyfriend, produced by Fatale Media, Inc., and directed by Shar Rednour, SIR Video co-founder. As an accomplished author of numerous sex guides and informational books on various sexual taboos, Violet Blue wrote and released The Adventurous Couple's Guide to Strap-On Sex in 2007.[60]The National Institutes of Health (NIH), with information published in the British Medical Journal (BMJ), states that, "There are little published data on how many heterosexual men would like their anus to be sexually stimulated in a heterosexual relationship", but that, "Anecdotally, it is a substantial number. What data we do have almost all relate to penetrative sexual acts, and the superficial contact of the anal ring with fingers or the tongue is even less well documented but may be assumed to be a common sexual activity for men of all sexual orientations

All About Sperm

Sperm, is short for spermatozoon (plural: spermatozoa). It is the male reproductive cell. It is carried in the male ejaculate (semen).A spermatozoon is about two thousandths of an inch long. There are about 200-500 million of them in a single ejaculation.Unlike every cell of the male body, which has 46 chromosomes (in 23 pairs), these cells have only 23 (not in pairs). The same is true for the female eggs. When a sperm and an egg combine they once again form a perfect cell with 46 chromosomes in 23 pairs. This one cell now has all the information (DNA) necessary to produce a complete human being. The combined DNA now has all the information of the physical characteristics of both parents.The head contains the 23 chromosomes. The body contains mitochondria (which power the tail). And the tail is what enables it to swim up the females cervix and fallopian tube(s) to her egg. They swim about 8 inches in one hour. To do this they need to wave their tail about 16,000 times!Not all of them come out alive or swim straight. But, if about half of them do, it is enough for fertilization.When these cells zero in on an egg the tail movement becomes more forceful and erratic. This hyperactivity is necessary to break through the two physical barriers that protect the egg.There are also certain protein molecules on the head of it that have a lock and key type action with a similar protein on the female egg. This prevents the sperm and egg of different species from getting together. Sperm swim vigorously in the direction of various female hormones. This is what guides them to the egg. The attraction is called "Chemotaxis".The chemotaxis attraction is extremely strong. In lab tests, even when the extract of these female hormones was diluted 100,000 times, the sperm still swam toward it! Women are born with a specific and limited quantity of eggs. Usually one to two million.Baby boys are born with a set number of underdeveloped sperm cells which are not technically sperm, yet. These cells eventually mature at puberty and they will create the reproductive type cells.Unlike the female human who uses up her eggs, a healthy male will create sperm his entire adult life from these underdeveloped cells.The process is called spermatogenesis.During spermatogenesis the underdeveloped cells make exact copies of themselves. Each cell will make four copies that will then mature into mature reproductive cells. It takes 65-74 days for the sperm cells to develop.The underdeveloped original cells do not become reproductive cells. They stay in the testicles and are saved for future "cloning".If the original underdeveloped "parent" cells are killed or damaged, the man would become sterile because he would no longer have the resources necessary to create new sperm. Although only one male cell will fertilize a female egg, one cell can not make it to the egg on it's own. That is why a man normally delivers 200-500 million of them per ejaculation.By swimming together they move the semen toward the egg where about 200 will finally reach the egg.Only one is allowed to penetrate the egg. Once it does, the egg hardens it's surface so that no more may penetrate. The male population in the USA has shown a large decrease in sperm count since the 1930s. Men today are producing only about half as much as we did just 70 years ago (ref: Environmental Health Perspectives, Vol. 101(2):65-71)Pesticides, drugs and mineral poor soils seem to be the reasons.The human reproductive system is highly vulnerable to pesticides. Men working in agricultural areas have shown more than ten times the incidence of infertility as compared to men in other occupations.The same applies to drugs and anesthesia (ref: Anesthesiology 54:53-56, 1981).

All About Sex

We look at some of the most important points of sex and being in a relationship. This includes pointers for both men and women on how to make your sex life blossomMaking sure you are fully protected against an unwanted pregnancy is very important for both the health of your relationship and youselves. We look at the options available to you.Most relationships are not perfect and require a little insight into the opposite sex and how they generally work. We offer some helpful advice to get the best out of you and your partner.Many couples at some point meet obstacles concerning their sex lives. Sex is an important component of a relationship and so we have advice on some of the more common problems.Coming into contact with a sexually transmitted disease (STD) always puts pressure on a relationship. We explore the treatments available if you become infected.Most relationships go through patches where everything is not as it should be. The key to solving issues is good communication and knowing when to seek help. Here you'll find tips for a fulfilling sex life plus advice on STDs, contraception and common sex problems.Female ejaculation is a phenomenon in which fluid shoots out of the vulva or vagina at the moment of orgasm. It is sometimes known as 'she-jaculation'. You may have heard the terms 'gushing' or 'squirting'.It's a controversial subject, not least because pornography writers (most of whom are male) have repeatedly suggested that all women ejaculate at orgasm. This is completely untrue!

All About The Penis

The penis is an important body part for sex that can be a source of pleasure and arousal, as well as anxiety and insecurity, for men and their partners alike.Concerns about the penis may include its size, the direction in which it points, as well as a host of sexual function issues, such as erectile ability and ejaculation. Many men wish that they had more control over some or all of these issues. But while some modifications can be helpful, concerns about the penis are often more a matter of perception than changing anything physically.It's important for men to be knowledgeable about what's normal for the penis and the role it plays in sexual satisfaction, so they can communicate with their healthcare providers, notice when there might be a problem, and feel comfortable discussing concerns or changes with a partner.Likewise, partners need to feel comfortable communicating what they do or don't enjoy about sex in relation to the penis. They also can greatly benefit, as can their sex life, when they develop comfort talking together about the penis, what's normal (or not), and what feels good . Many partners are afraid of offending a man, for instance if she wants to use a dildo or try other types of stimulation, or else couples may feel uncomfortable talking about the penis in general, whether good or bad. Good information about the penis can help open up a healthy dialogue and make both partners feel more satisfied in and out of the bedroom.Penis size and sexual satisfaction.•Normal ranges for penis size.•Intercourse tips for men with smaller or slimmer penises.•Aging and penis size.•A bent or crooked penis.•One testicle is bigger than the other.•Pain in the penis during or after intercourse.•Nonsurgical techniques for penis enlargement.Penis size and sexual satisfaction.Many men and women mistakenly believe that bigger is better when talking about penis size and a partner's sexual satisfaction. This perception may cause men a significant amount of anxiety about penis size and it can prevent both partners from reaping the sexual satisfaction they might otherwise experience.While some partners may enjoy larger-sized men, the truth is that penis size in and of itself is generally not the key to sexual satisfaction. For many women, the clitoris plays a primary role in orgasm ability, as does the area around and just inside the vaginal opening, which is full of nerve endings. As a result, grinding during intercourse and other types of external stimulation (such as hand or oral stimulation of a parter's genitals) are generally equally, if not more, satisfying than deep penetration. Women who enjoy G-spot stimulation also benefit from more shallow stimulation.In fact, despite a bigger-is-better attitude, partners of men with especially large penises may find that sex becomes uncomfortable, whether vaginal intercourse, oral sex or anal sex, for same and other-sex partners alike. A large penis isn't always an advantage during sex.Ultimately, enjoyable sex is a function of intimacy, the connection between two partners and the many other intangibles that make sex meaningful. We all need to work with what we have and men of all shapes and sizes can do plenty to learn to satisfy and pleasure their partner.Normal ranges for penis size.When talking about penis size, there are generally two meaningful dimensions. The first is penis length, the measurement from the base of a man's penis (usually close to where his pubic hair begins) to the tip (where the urethra opens at the end of the glans). The second dimension is girth, which is the distance around a man's penis (i.e., the circumference), usually measured at the middle of a man's penile shaft.The average length of a nonerect penis is three to four inches. Once erect, the average size of an erect penis is five to seven inches in length and four to six inches in girth, and 85 percent of men fall within this range. Unfortunately, many men compare themselves to other men when they're in the locker room or elsewhere, when the truth is that most men end up a similar size once erect, supporting the idea that some men are "showers," meaning they are larger when flaccid, and some men are "growers," meaning they are smaller when flaccid but increase in size more once erect.Of course, a man's erect penis may range in length from less than two inches to 16 or more inches. However, few men are at these extremes; the majority of men fall in the typical range.The size of a man's penis is mostly determined by genetic factors and there isn't much he can do to increase its size.Friction is an important part of what makes intercourse enjoyable for couples, by simultaneously stimulating the genitals (or anus) of both partners. Sometimes, couples desire more friction during intercourse to increase sensation and improve orgasm ability. Other times, men experience drop-out issues during intercourse because of a change in erectile function or a mismatched fit with a partner. The good news is that it's easy to improve snugness during intercourse and boost both partners' sexual satisfaction.Female partners can use their pelvic floor muscles to squeeze around the penis during intercourse, which will add friction for both partners and is likely to additionally boost her arousal, by increasing blood flow to the area. A woman should make the same movement she does during Kegel exercises, which can be either quick pulses or longer contractions.Certain intercourse positions encourage a better penile-vaginal fit, too, especially those that encourage grinding over thrusting. Couples can try the CAT and Woman-on-Top to experiment with what feels good.Men who think they are lacking in girth also can focus on G-spot stimulation by trying positions that encourage it.

Why the Fetish About Footnotes?

Is there a college graduate alive who doesn't react to the words "footnotes" and "bibliography" with at least a small shiver of lingering dread? But while the citations, the style manuals, the numbering, the numbing tedium are just unpleasant memories to folks who now labor far from the groves of academe, they are a continuing affliction for scholars in the humanities. Thanks to the Internet, it doesn't have to be that way.Accurate sourcing guarantees that researchers make rigorous inquiries, handle evidence responsibly, and give credit where it's due. In my first year of graduate school back in the early 1980s, a professor I worked for gave me a stern lesson in research. He was wrapping up an essay on Romantic poetry that borrowed upon recent critical studies, each one of them citing, in turn, previous works of scholarship and primary texts. We went up to the library one afternoon to make sure his immediate sources had reproduced earlier sources accurately. That meant collecting old books and journals one by one and finding relevant pages and passages. "Can't you just assume they did it right?" I asked. He looked at me, raised a finger, and replied: "Never trust a footnote--always check the original." After an hour we found one slight misquotation. He corrected it in his text and proved the point: Do your homework and get it right.It can be so much easier now. If you're in the middle of a 400-page tome and want to verify a footnote on an essay by John Dewey from 1905, you don't have to leave your desk. Almost all scholarly journals are now online. A click to the library Web site, then to the electronic version of the Journal of Philosophy, Psychology, and Scientific Methods gives you Dewey's piece "The Realism of Pragmatism" in handy pdf format. Thousands of old books important to scholars are available, too. If you need to check a quote from William James's volume "Pragmatism," there it sits at Google Books, and a word search carries you right to the relevant passage. As more e-versions become available, only books still in copyright and unique archival documents require a day trip to the library or a trip across the country to a special collection. All those hours pulling old periodicals off the shelves, recalling old books and poring through 45 pages to find one sentence shrink to minutes of online delving.The process works most efficiently, of course, when scholarly writing is online and the scholar embeds a link into the text so that readers can click directly to the original source. But even in hardcover books and paper-and-ink periodicals, a Web page reference inserted at the end of a sentence allows readers to type it into a laptop and have both works at hand for comparison. One of the prime reasons for documentation, the evaluation of a scholar's evidence, happens more smoothly--and collegially. Researchers who don't have access to print versions of the works cited in a book they are reading can download them and join professional conversations well-equipped and up to speed. Graduate students who are pressed for time and money but have to complete a reference-heavy dissertation move swiftly toward that blessed ascension to Ph.D. status.Yet digital modes of citation have not been standardized as scholarly practice in the humanities. The 2008 MLA Handbook still spends 97 pages detailing nondigital formats and protocols of documentation. This means that scholars must devote long hours to an apparatus that in a digital age is inefficient and increasingly unnecessary. As links have multiplied and become standard practice in blogs, online magazines and e-commerce, the academic model appears ever more just that--academic. Citations are supposed to enhance scholarly communication, but as you read one monograph after another, wading through notes and works cited until the eyes glaze over, you sense a different objective at work. Authors clog the pages with notes not to facilitate peer review, but to demonstrate their place at the table, their ability to speak an obscure language that few bother to translate for the world at large.

Oral sex

Oral sex is sexual activity involving the stimulation of the genitalia of a sex partner by the use of the mouth, tongue, teeth or throat. Cunnilingus refers to oral sex performed on females while fellatio refer to oral sex performed on males. Anilingus refers to oral stimulation of a person's anus. Oral stimulation of other parts of the body (as in kissing and licking) is usually not considered oral sex. People may engage in oral sex as part of foreplay before sexual intercourse, during, or as intercourse.Facesitting is a form of oral sex in which the receiver sits on the giver's face and pushes into it with his or her genitals.Oral sex can be performed by both partners at the same time in the so-called "sixty-nine" position. Spitting and/or swallowing of the ejaculatory fluids or giving a pearl necklace may cause different sexual stimulations. Autofellatio is a possible but rare variant; autocunnilingus may also be possible for women with extremely flexible spines.An act of group sex restricted to one woman giving oral sex to several men is referred to as a gangsuck, blowbang or lineup, all derivatives of the slang expression gang bang for group sex. Bukkake and gokkun may also involve oral sex, though not necessarily.Oral sex may be practiced by people of all sexual orientations. In heterosexual contexts, oral sex is used by some couples as a method of contraception and may be chosen as an alternative to vaginal intercourse for this reason. Oral sex alone cannot result in pregnancy.[1] Under any normal circumstances, there is no way for sperm from the penis to enter the uterus and Fallopian tubes to fertilize an egg; in humans, there is no connection between the gastrointestinal system and the reproductive tract.[nb 1] Ingested sperm will be killed and broken down by acid in the stomach and proteins in the small intestine. The breakdown products will be absorbed as a negligible quantity of nutrients. However, the act does carry a potential risk of pregnancy if semen from the man comes in contact with the vaginal area indirectly. This can occur if the semen in the ejaculate is carried on the fingers, hands, or other body parts; and comes in contact with the vaginal area. It is therefore still necessary to exercise caution when having oral sex to prevent pregnancy.Oral sexual activities are not necessarily effective methods of preventing sexually transmitted diseases (STDs), although some forms of STD are believed to be less easily spread in this way, and oral sex has been recommended as a form of safe sex.[2][3][4] In the United States, no barrier methods for use during oral sex have been evaluated as effective by the Food and Drug Administration.[5] However, a barrier protection like a condom for fellatio or dental dam for cunnilingus can offer some protection from contact when practicing oral sex.[6] Oral contact should be limited to the protected areas. A makeshift dental dam can be made out of a condom[7] or a latex or nitrile glove.[8] However using a real dental dam is seen as preferable because real dental dams cover a larger area, avoid accidents caused by "slipping" outside the covered area, and avoid the risk that makeshift versions may be accidentally damaged or poked with the scissors during the cutting procedure. Plastic wrap may also be used as a barrier during oral sex, but there exists no conclusive scientific research regarding how effective it may or may not be at preventing disease transmission.[9] Certain kinds of plastic wrap are manufactured to be microwaveable and are designed to have pores that open when heated, but there also exists no scientific research on what effect, if any, this has on disease transmission when used during oral sex.[10] Some people complain that the thickness of the plastic dulls sensation.

The Earth's Crust

The Earth's crust is an extremely thin layer of rock, like the skin of an apple in relative terms. It amounts to less than half of 1 percent of the planet. But the crust is exceptionally important, and not just because we live on it. The crust can be thicker than 80 kilometers in some spots, less than one kilometer in others. Underneath it is the mantle, a layer of rock some 2700 kilometers thick that accounts for the bulk of the Earth. The crust is primarily made of granite and basalt while the mantle beneath is made of peridotite. More about all that below. Until just a century ago, we didn't know the Earth has a crust. From astronomical measurements, we knew in the late 1800s that Earth wobbles in relation to the sky as if it had a large, dense core. Beyond that we had no clue, until the advent of seismology. Even today, almost all we know for sure about the deep Earth comes from just one type of evidence: the speed of sound in rock as measured using seismic waves, usually called seismic velocity. The rest is known from intricate, subtle modeling studies. In 1909 the seismologist Andrija Mohorovicic published a paper establishing that about 50 kilometers deep in the Earth there is a sudden change in seismic velocity--a discontinuity of some sort. The discontinuity makes the seismic waves bounce (reflect) and refract (bend), just as light behaves at the discontinuity between water and air. Ever since, that discontinuity, the Mohorovicic discontinuity or "Moho," has been accepted as the boundary between the crust and the mantle beneath. The crust is not the same thing as the plates of plate tectonics. Plates are thicker than the crust and consist of the crust and the shallow mantle just beneath it; the combination is stiff and brittle and is called the lithosphere ("stony layer" in scientific Latin). The lithospheric plates lie on top of a layer of softer, more plastic mantle rock (the asthenosphere or "weak layer") that allows the plates to move slowly upon it like a raft in thick mud. We know that the Earth's crust is made of two grand categories of rocks: basaltic and granitic. Basaltic rocks underlie the seafloors and granitic rocks make up the continents. The seismic velocities of these rock types in the lab match the velocities in the crust down to the Moho, so we're pretty sure that the Moho marks a real change in rock chemistry. The Moho isn't a perfect boundary, because some crustal rocks and mantle rocks can masquerade as the other, but even so everyone who talks about the crust, whether in seismological or petrological terms, fortunately means the same thing.

teqniques of mastubation

Ways of masturbating common to members of both sexes include pressing or rubbing the genital area, either with the fingers or against an object such as a pillow; inserting fingers or an object into the anus (see anal masturbation); and stimulating the penis or vulva with electric vibrators, which may also be inserted into the vagina or anus. Members of both sexes may also enjoy touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Both sexes sometimes apply lubricating substances to intensify sensation.Reading or viewing pornography, or sexual fantasy, are often common adjuncts to masturbation. Often people will call upon memories during masturbation. Masturbation activities can be ritualised and various fetishes and paraphilias may play a part. Some potentially harmful or fatal activities include autoerotic asphyxiation and self-bondage.Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra (the tube through which ur1ne and, in men, semen, flows),[11] a practice known as urethral play or \"sounding\".[12] Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection.[13] Some people masturbate by using machines that simulate intercourse.Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. They may repeat this cycle multiple times. This \"stop and go\" build-up, known as \"edging,\" can achieve even stronger orgasms.[14] Rarely, people quit stimulation just before orgasm to retain the heightened energy that normally comes down after orgasm.[15]