As a form of non-penetrative sex, it can be done for its own enjoyment or as foreplay. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Snowballing or snowdropping is the human sexual practice in which one person gay hentai takes someone else semen into his or her mouth and then passes it to the mouth of the other, usually through kissing. On the other hand, the masochist enjoys being hurt, humiliated, or suffering within the consensual scenario. Buttocks are sometimes emphasized in pornography, where they are often referred to as booty. For videos porno gay some people, non-penetrative sex is the primary sexual activity of choice above all others. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others. Works in this genre may be considered adult for any number of reasons. Double Stuffed , Double big tit milf Vaginal , or Double Anal pornography involves the penetration of one orifice by two penises or other objects. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. The other person may do the same during or after. Some anthropologists and sociobiologists believe that breast fetishism derives from the breasts similarity to buttocks, but instead provide sexual attraction from the front of the body. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. 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 .