While bondage is a very popular variation hentai sex within the gaysex larger field of BDSM, it is nevertheless sometimes differentiated from the rest of this field. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903. Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. There is no singular or archetypical behavior; therefore, a wide range of thought patterns and behaviors exist, but all tends to be a harmless and efficacious release from some kind of pressure. Homi Bhabha defined the idea of a racial fetish in contrast to the idea of the Freudian sexual fetish which he describes a denial of difference, where the male sees the female as a castrated male, seeing missing parts rather than a different anatomy. Sometimes special furniture is used, such as a queening stool or smotherbox. People may engage in anilingus for its own sake, before anal fingering or penetration, or as part of foreplay. Target audience are teenage lesbian milfs / young adult women. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. 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. Because the viewing of such films carried a social stigma, they were viewed at brothels, adult movie theaters, stag parties, at home, in private clubs and also at night cinemas.