The stigma of being gay or labeled as such has steadily eroded since the Stonewall riots began the modern American gay rights movement in 1969. Some techniques which may work for one individual can be difficult or uncomfortable for another. The current record is held by Lisa Sparks who had sex with 919 men on October 16, 2004 in Warsaw, videos porno gay Poland as part of the Third Annual World Gangbang Championship and Eroticon 2004. As a result, little in history was documented to give an accurate description of how female homosexuality is expressed. In modern BDSM vernacular, the queening stool allows open access to the crotch while seated. The smotherbox is hentai porn placed on a stable surface. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. As of 2013, little analysis of this paraphilia has been reported in medical literature. 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. English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. There may be more than two participants; both group sex and gang banging can be included. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. This fetish sometimes originates from childhood memories of needing, or of seeing another milf xxx needing, to urinate. 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.