Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. Some actors who are actually gay or bisexual will be marketed as straight to appeal to the allure of the unattainable, because straight men are virgins to sex with other men, and as in most gay male settings, the young, the muscular, and the unfamiliar are more sought.. 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. A female dominant in a master/slave relationship is often termed a Mistress, not to be confused with the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. There is also some evidence that pornography can be used to treat voyeurism. The padding may also muffle noises from the outside, causing a relaxation effect and heightening their other senses. Well-known female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét. The first film was released in 1980 starring Kay Parker. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Body parts including fingers, tongue and penis may be used for lesbian hentai anonymous oral, vaginal and/or anal intercourse. Technically this is a form of exhibitionism rather than group sex per se. See Gay-for-pay. This technique may include the use of a simulacrum, or artificial vagina. Fisting may be gay boy porn performed with or without a partner. Buck Angel is the best-known actor in this genre. The sub-genres usually conform to certain horny milfs conventions, and each may appeal to a particular audience. When he is in position the cover is closed. Bisexual DVDs sell much better online than in adult video stores, possibly due to customers in stores feeling embarrassed to buy them. In September 2003 the BBC reported on the new dogging craze.