Softcore gay pornography also exists; it at one time constituted the genre, and may be produced as beefcake pornography for heterosexual female and homosexual male consumption. For example, in Australia it is rated Refused Classification . Several hundred exclusively pegging films were produced, as well as twice as many bisexual and straight films with strap-on scenes. Preggo pornography features pregnant performers and may include erotic lactation as a fetish. The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century construct. This may help them develop their orgasm, increase its pleasure, and may inspire them to masturbate on a more frequent basis. 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 . The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. Even though the performers who perform in these films typically appear on many reality websites within a short span of time, most of these websites claim that each of them is an amateur. Common positions include porno gay lying on back or face down, sitting, squatting, kneeling or standing. It is sometimes combined with BDSM features. The phrase is commonly found on porn sites. Typically featured are hitting, choking, name-calling and hair-pulling. Lolicon and its contribution to the controversy regarding the regulation of pornography of depicting minors that don’t exist has been a major issue for free speech in and outside of Japan. Is also common of the furry genre. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent.