This makes varying degrees of stimulation an integral part of oral sex for many men. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. The use of the word creampie to describe such scenes originated in U. BDSM communities generally welcome anyone with a non-normative streak who identifies with the community; this may include cross-dressers, extreme body mod enthusiasts, animal players, latex or rubber aficionados, and others. Starting with erotic stories and woodblock prints from before the 20th century, Japanese pornography evolved into distinct subcategories with the media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime . Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. For example, in Australia it is rated Refused Classification porn milf . Foot fetish pornography features hentai videos heavy emphasis on the feet of the participants, either in combination with kissing and genital sex or in the context of acts such as trampling or crush fetishism. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. Types of anal sex can also be a part of lesbian sexual practices. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it. Its gain in prominence has been attributed to its depiction in the film Pecker, which was released in 1998. Bondage websites and bondage imagery in mainstream pornography videos porno gay 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.