In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. 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 gay bear porn 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. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. 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. Amateur porn has been called one of the most profitable and long-lasting genres of pornography. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Ethnic pornography is naked milf a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. Actual upskirt or downblouse shots may violate privacy laws in some countries. There may be more than two participants; both group sex and gang banging can be included. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second hentai sex recipient mouth. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth.
