Its primary goal is sexual arousal in its audience. 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 . Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. Though there have been numerous gang gay cock bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen men. Men may find stimulation of the anus, rectum, and adjacent organs enjoyable. The existence of such content in commercially available pornography is widely considered an urban legend. Bottom and submissive are widely recognized terms for those partner in the relationship or activity who are, respectively, the physically receptive or controlled participants. Transsexual pornography is a genre of pornography. In the fetish cuckolding subculture, it is most common for the female to take on the sexually dominant role and the male the submissive role, however, female subs, sometimes referred to as cuckqueans, also exist. Pornography hentai porn may fall into more than one genre. 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. As of 2013, little analysis of this paraphilia has been reported in medical literature. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. Even though the performers who perform in these films typically appear on many reality websites within a big tit milf short span of time, most of these websites claim that each of them is an amateur.