Each participant may engage in any type of sex acts with one or hot gay sex both of the others, such as vaginal, anal or oral sex or mutual masturbation. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head. The buttocks in human females thus contain more adipose tissue than in males, especially after puberty. Hugo Ohira, director of marketing for Silvercash, rhetorically asks Who does not like spewing their load on a pretty young face? Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. Such explicit sexual interaction is seen only rarely in public play spaces, and it is sometimes specifically banned by the rules of a party or playspace. The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving. 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. As of 2013, little analysis of this paraphilia has been reported in medical literature. 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. Currently, animated television series lesbian hentai aimed at adults are some of the most popular and critically acclaimed forms of entertainment. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias. 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. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures milf xxx having sexual intercourse with female characters.