People may engage in anilingus for its own sake, before anal fingering or penetration, or as part of foreplay. The porn industry and viewing public were shocked by the then-taboo spectacle of a white woman having sex with a black man. Since development and pronunciation of the buttocks begins at menarche and declines with age, full buttocks are also nude milfs a symbol of youth. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. The current record is held by Lisa Sparks who had sex with 919 men on October 16, 2004 in Warsaw, Poland as part of the Third Annual World Gangbang Championship and Eroticon 2004. Gloryhole pornography features hentai movies women performing fellatio on unidentified men through a small hole hot gay sex made in a bathroom divider. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. 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. Jerk off instruction features a performer encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm. Entacle erotica describes a type of pornography most commonly found in Japan which integrates traditional pornography with elements of bestiality and a fantasy, horror, or science-fiction theme. Bottom and submissive are widely recognized terms for those partner in the relationship or activity who are, respectively, the physically receptive or controlled participants. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt.