Ass to mouth pornography shows the transfer of a performer penis from a second performer anus to that same second performer mouth in a single shot. Going back at least as far as the Christy twins in the 1970s, depictions of incest and particularly incest between twins has been a feature of gay pornography. The first film was released in 1980 starring Kay Parker. 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. But starting with The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. Pornography is often referred to as porn and a pornographic work as a porno. Lesbian pornography gay sex video made for women is hentai porn usually made by women, and usually features women who identify as lesbian or bisexual. As with most forms of sexual activity, anal sex participants risk contracting sexually transmitted infections . Clothes wetting: The person is sexually aroused by wetting one clothing or observing another person doing so. Consent is the most important criterion here. It may be regarded as taboo or unnatural, and is a criminal offense in some countries, punishable by corporal or capital punishment; by contrast, people also regard anal sex as a natural and valid form of sexual activity that may be as equally fulfilling as any other desired sexual expression. The 1979 U. A sub-set of vaginal fisting attempts to photograph the female cervix immediately after the fist is removed from the now-gaping vagina. Other possibilities momsex are possible, such as a man having sex with two women who are having sex with each other. This may relate to fetishes such as voyeurism or cuckolding. 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.