By Japanese law, the genitals of actors and actresses must be censored and up the mid-1990 so was the depiction of pubic hair. In human sexuality, a threesome is sexual activity that involves three people at the same time. Real enema shots or videos of true medical situations may violate privacy laws in some countries. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. Transsexual pornography is a genre of pornography. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. Target audience are teenage / young adult women. Terminology for roles varies widely within the various BDSM subcultures. There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. The definition clash also appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. The term applies to the depiction of the act rather than the act itself, and naked milf so does not include live exhibitions like sex shows and striptease. Lesbianism has been a theme in erotic art since at least the time of ancient Rome, and many regard depictions of lesbianism to be erotic. This can, however, redirect semen into the bladder . Shibari is a Japanese word that literally means to tie or hentai videos to bind. Pornography is gay bear porn often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions.