Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Sex parties may be organized to enable people to engage in casual sexual activity or for swinging couples or people interested in group sex to meet, but any gathering where sexual activity is anticipated can be called a sex party. Rainbow party A rainbow party is an urban legend spread from the early 2000s. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs celebrity cartoon porn but now also includes professionally made pornography designed to appear as if it were amateur. Interracial pornographic films have experienced an explosion in popularity, becoming one of the fastest-growing and biggest-selling genres. 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. Animal masturbation has been observed in many species, both in the wild and in captivity. Foot fetish pornography features heavy emphasis on the feet of the participants, either in combination with kissing and genital sex or in the context of acts such as trampling or crush fetishism. English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label. The name is a reference to gonzo journalism, in which the reporter is part of the event taking place. Shibari is a Japanese word that literally means to tie or to bind. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Men may also rub or massage the glans, the rim of the glans, and the frenular delta. In some scenes or relationships it may be impossible for consent to be withdrawn in the middle of a scene, or the bottom may have the ability to revoke consent for a relationship as a whole, but not for a particular scene.