The gay boy porn smotherbox is placed on a stable surface. Both forms of pornography generally contains nudity. As of 2013, little analysis of this paraphilia has been reported in medical literature. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. This industry employs thousands of performers along with support and production staff. It is commonly depicted in pornography, but very rarely in mainstream cinema. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. It is used, for example, at fertility clinics to stimulate sperm donors. 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. Some men also enjoy anal stimulation, with fingers or otherwise, without any prostate stimulation. Dwarfs hentai sex or midget pornography features performers big tit milf who are dwarfs/midgets. Some women who engage in same-sex sexual activity may reject not only identifying as lesbians but as bisexual as well, while other women self-identification as lesbian may not align with their sexual orientation or sexual behavior; sexual identity is not necessarily the same as one sexual orientation or sexual behavior, due to various reasons, such as the fear of identifying their sexual orientation in a homophobic setting. The existence of such content in commercially available pornography is widely considered an urban legend. Multiple men and women Bisexual pornography features one woman and two men who all perform sex acts on each other.