Performing oral sex after analingus is not something that should be done as it will transfer harmful bacteria into the urethra pee tube of both a male and female recipient. Centers for Disease Control. This is a macho inversion of the love theory. Based on the scientific evidence discussed in this chapter, Table 2 classifies sexual practices by their level of risk for HIV transmission. Larco Museum Collection In Japan, records including detailed shunga show that some males engaged in penetrative anal intercourse with males,  and evidence suggestive of widespread male-female anal intercourse in a pre-modern culture can be found in the erotic vases, or stirrup-spout pots, made by the Moche people of Peru; in a survey, of a collection of these pots, it was found that 31 percent of them depicted male-female anal intercourse significantly more than any other sex act. Some people even go as far as anal fisting.
The British biologists Baker and Bellis have suggested that the female orgasm may have a peristalsis or "upsuck" action similar to the esophagus ' ability to swallow when upside down , resulting in the retaining of favorable sperm and making conception more likely. In , Freud stated that clitoral orgasms are purely an adolescent phenomenon and that upon reaching puberty, the proper response of mature women is a change-over to vaginal orgasms, meaning orgasms without any clitoral stimulation. However, the sensations in both sexes are extremely pleasurable and are often felt throughout the body, causing a mental state that is often described as transcendental, and with vasocongestion and associated pleasure comparable to that of a full-contractionary orgasm. Others may be too embarrassed to open the discussion. The ratio of male-to-female summary mean transmission rates in the developing world compared to the rate in Western countries was 2. So when women are surveyed about their last sexual experience, the only women who say they had anal sex are the ones who had orgasms. Well, shame on me. When engorged, the prostate gland can be felt through the perineum just behind the scrotum a. The more I love and trust someone, the more likely I am to have an orgasm while with him—and the more likely I am to be okay with pushing society's "norms" with him. Again, anal sets a higher bar. In addition, condom breakage or failure may occur. They argue that the presence of this particular frequency of contractions can distinguish between voluntary contraction of these muscles and spontaneous involuntary contractions, and appears to more accurately correlate with orgasm as opposed to other metrics like heart rate that only measure excitation. And why do those who do it most often women who reported anal intercourse in their last encounter get the most orgasms? Decisions About Specific Sexual Practices Evidence shows that some sexual practices are associated with a greater risk of HIV transmission than others. This chapter reviews the evidence that has led to the development of safer-sex guidelines, and concludes with specific recommendations for safer-sex practices. The paradox to be explained is why an act widely considered icky or deviant correlates with orgasms. It is believed that the exact feeling of "orgasm" varies from one man to another. He "concluded that satisfaction from penile penetration [is] mainly psychological or perhaps the result of referred sensation". It is important to keep in mind that safety and efficacy have not been demonstrated in anal use, and that female condoms are neither recommended nor approved for this purpose. Anal sex is associated with orgasms, but mostly because both anal sex and orgasms occur more frequently with alphas. Decisions About Partner Selection Sexual contact with many persons increases the probability of coming in contact with an HIV-infected partner. Because of this, some couples practice anal intercourse as a form of contraception , often in the absence of a condom. It is incumbent on health care providers to perform HIV risk assessment as an integral part of the medical history, and to provide HIV prevention counseling as an integral part of patient education and anticipatory guidance. This reaches a peak at orgasm when the female brain's emotion centers are effectively closed down to produce an almost trance-like state. Women who don't much feel like having vaginal sex often do it anyway. To the extent that this factor explains the happy endings, the anal orgasm data are inflated.
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