Women adult anime oriented pornography is sometimes referred to as sex positive pornography. This genre also features male-on-male fellatio through a small hole made in a bathroom divider. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Yaoi is anime or manga that features gay males . Those with diaper-related paraphilias differ widely in their focus of attention. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the theme, for example, a male performer dressed as a wizard. Femdom features BDSM scenes in which the dominant partner is female. Yuri : Featuring two grown adult women in a homosexual/lesbian relationship. Though there have been numerous gang bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen gay movies men. Pornography may fall into naked celebrities more than one genre. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive porn milf of the addition of additional sex parties. Mammary intercourse is known as titty-fucking, titfuck, or a titjob in the United States, as well as tit wank or French fuck in the United Kingdom - the latter term dating back to the 1930s; while a more jocular equivalent is a trip down mammary lane. Bondage websites and bondage imagery in mainstream pornography As of 2003, specialist bondage magazines were mostly displaced by the availability of bondage material on the World Wide Web, and the presence of bondage imagery in mainstream pornographic magazines such as Nugget and Hustler Taboo magazine. The term bondage hentai videos describes the practice of Physical restraining. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12.