A gayporno celebrity may allow such a recording to surface willingly, as part of a publicity stunt. Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903. 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. 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. By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair. Reality pornography is professionally made porn which seeks lesbian hentai to emulate the style of amateur pornography. Some techniques which may work for one individual can be difficult or uncomfortable for another. Simultaneous penetration of the mouth and either the vagina or anus. There is also some evidence that pornography can be used to treat voyeurism. The current record is held by Lisa Sparks who had sex with 919 men on October 16, 2004 in Warsaw, Poland as gay twinks part of the Third Annual World Gangbang Championship and Eroticon 2004. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. The name of the practice, when it is done in a repeated in-and-out mobile porn movies motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea. Bondage/BDSM Bondage pornography features performers tied big tit milf up or constrained in various ways. Body parts naked celebrities including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse.