The range of its individual characteristics is thereby wide. 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 . In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . A pornographic work is characterized as hardcore if it has any hardcore content, no matter how small. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. This industry employs thousands of performers along with support and production staff. Transgender pornography features performers who cross-dress for sexual gratification, either for themselves or for their partners. Other fetish Bareback pornography features performers hentai porn who are not wearing condoms. It contains graphic sexual activity and visible penetration. This stop and go build-up, known as edging, can achieve even stronger orgasms. Threesome can also refer to a love triangle, a three-way romantic relationship. Bukkake is a sex act portrayed in pornographic films, in which gay sex video several men ejaculate on a woman, or another man. John Stagliano is considered to have started the gonzo pornography genre with his Buttman series mature milfs of films. There is, however, no third party camera work involved. A sex party is a gathering at which sexual activity takes place. Examples of mentally oriented practices are education games, during which the dominant requires certain forms of behavior from the submissive. Transsexual porn star Wendy Williams has stated that transsexual Porn is classified as Straight Specialty. 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.