Pussing: British expression for an activity involving a consenting couple where the male partner watches the woman urinate otherwise undetected in a semi-public place, usually a toilet cubicle at a pub, hotel, restaurant, theatre/cinema, office, club etc. Foot fetishism has been defined as a pronounced gay bear porn sexual interest in the feet or footwear. Yaoi is anime or manga that features gay males . Threesome can also refer to a love triangle, a three-way romantic relationship. It contains graphic sexual activity and visible penetration. The existence of such content in commercially available pornography is widely considered an urban legend. The anime hentai industry generally refers to such films as adult films, which is part of adult entertainment. Such ejaculation can be done by mammary intercourse, or masturbation over the other person, or result from the withdrawal of the penis from a partner mouth as he is ejaculating following fellatio, irrumatio, or intercourse. Transgender pornography features performers who cross-dress for sexual gratification, either for themselves or for their partners. John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view. Bondage lesbian milfs pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or drawings. For instance, Amateur Allure has a trademark shot where the sexually performing cameraman circles a handycam around the sexually performing model head. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively passive . Advocates of RACK argue that SSC can hamper discussion of risk because no activity is truly safe, and that discussion of even low-risk possibilities is necessary for truly informed consent.