Originating celebrity sex videos in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. Bottom and submissive are widely recognized terms for those partner in the relationship or activity who are, respectively, the physically receptive or controlled participants. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. Shibari is a Japanese word that literally means to tie or to bind. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. Other objects such as ball point pens and thermometers are sometimes used, although this practice can lead to injury and/or infection. Commercialized pornography accounts for anime hentai a nearly US0 billion worldwide industry for the production of various media and associated products and services. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Older names for a pornographic film include stag film, and blue movie. Its primary goal is sexual arousal in milf xxx its gay movies audience. Some may keep hd mobile porn their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. Actual spying may violate privacy and/or trespassing laws in many countries. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. As of 2013, little analysis of this paraphilia has been reported in medical literature. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider. The inside of a smotherbox is often padded to provide support for their neck and prevent their head from moving.