Anal sex or anal intercourse is a commonly practiced human sexual behavior. It involves the anus and rectum, especially, but not limited to, the insertion of the erect penis into the rectum through the anus. The use of sex toys and other activities involving the anus and rectum can be considered anal sex as well. Anal sex can be pleasurable for both the insertive partner and the receptive partner. The anus contains many of the same kinds of nerves as the penis or clitoris. mostly anal sex but also some sites dedicated to the perfect ass