The most common type of erotic spanking is administered on the bare buttocks, but can also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness. BDSM is a variety of erotic practices involving dominance and submission, role-playing, restraint, and other interpersonal dynamics. 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. As of 2013, little analysis of this paraphilia has been reported in medical literature. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. Some women who engage in same-sex sexual activity may reject not only identifying as lesbians but as bisexual as well, while other women self-identification as lesbian may not align with their sexual orientation or sexual behavior; sexual identity is not necessarily the same as one sexual orientation or sexual behavior, due to various reasons, such as the fear of identifying their sexual orientation in a homophobic setting. Women horny milfs porn is often produced by women and aimed specifically at the female market - rejecting the gay sex video view that men are turned on by porn but women only by a box of chocolates. Fisher said that perhaps, the fleshy, rounded buttocks attracted males during rear-entry intercourse. It like associating every Christian with the zealots who cause religious wars. Pornography is 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. Transsexual pornography is a genre hentai movies of pornography. Creampie scenes depart from heterosexual pornographic convention in favor of a depiction that more closely mimics sexual intercourse as performed in ordinary life; they have been called the counterimage of facials.