Sloppy seconds is a slang phrase for when a man has sexual intercourse with another person who already has received another man penis in the relevant orifice and is therefore wet or sloppy. 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. Jail/Prison/Police pornography involves people in police custody or inmates in jails or prisons in various sexual situations, gay twinks such as strip searches or body cavity searches. The nipples are erogenous zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. It explores the more mental aspect of BDSM. Pegging is a recently invented word which features a woman penetrating a man with a strap-on dildo. Reality Reality pornography refers to real or faked amateur encounters. This is commonly called double anal or double stuffing. The first film was released in 1980 starring Kay Parker. High heel pornography involves women or men dressed in high heeled shoes. 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. Cum swapping gay hentai pornography involves performers trading semen between their mouths. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films big tit milf still include racial stereotypes, although the segregation of actors by race has diminished considerably. Some couples use pornography at times for variety and to create a sexual interest or as part of foreplay. The Japanese sex industry uses the term Paizuri . Bukkake, Gokkun, Omorashi, and tentacle erotica are few uniquely Japanese genres known to western viewers. Consent is the most important criterion here. 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.