In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Insertion in pornography features 3d hentai women inserting various odd objects into their gay twink porn anus or vaginas. Watersports pornography features sexual activities involving urine, such as golden showers. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Well-known female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Caro rejected that as being a necessary conclusion, stating that female fatty deposits on the hips improve individual fitness of the female, regardless of sexual selection. A variant of this is known as ATOM or ATOGM where the insertive partner removes his penis from one recipient anus and inserts it into a second recipient mouth. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. The first pegging scene appears to have been in the non-pornographic 1970 film Myra Breckinridge, based on the novel of the same name by Gore Vidal, although it was not explicit. Consent momsex is the most important criterion here. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. Male masturbation may differ between males who have been circumcised and Blowjob those who have not. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably.