Men overwhelmingly report positive experiences following performing anal sex on a female partner. Men are sexually interested by variety, but aside from this, there is no relevant evolutionary argument, as anal sex of course produces no heirs. Such a woman, in embracing anal sex, is embracing it with no intent or possible result of pregnancy - it is sex, at its rawest. Surprisingly large numbers of people don't regard anal sex as actual sex. But, more than half of women who have had receptive anal sex describe it as an unpleasant experience they probably wouldn't repeat. The overall conclusions are that the women who are willing to engage in anal sex tend to be more adventurous, more sensual, more relaxed in bed, and thus, more orgasmic. Anal sex means penis-in-anus butt intercourse. This preparation and work, the special attention to preparation, serves as an intense form of foreplay, heightening excitement, extending the sexuality and sensuousness of the encounter, and, not incidentally, increasing the chances that the woman will have an orgasm , through the extended foreplay and stimulation. Use a condom to cover the penis, or a dental dam, cut-open condom, or plastic wrap to cover the vulva or anus to help prevent STDs. Sex should feel good and be comfortable for both of you. Vibrators run on electricity or batteries, and they vibrate buzz when you turn them on.