Hentai narrow Japanese usage and broad international usage are often incompatible. In humans, females generally have more round and voluptuous buttocks, caused by estrogen that encourages the body to store fat in the buttocks, hips, and thighs. The fantasy is typically based around one or more larger beings dominating a smaller being. The term is typically used by the cinematographer within the narrative framework of a pornographic film, videos porno gay and since the 1970s has become a leitmotif of the hardcore genre. Reality pornography is a genre of pornography where staged scenes, usually shot in cinéma vérité fashion, set up and precede sexual encounters. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Sadism describes sexual pleasure derived by inflicting pain, degradation, humiliation on another person or causing another person to suffer. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. It has since become popular enough with couples to be discussed during an episode of Sex and the City. The term comes from the French voyeur, one who looks. The warm sensation felt when urine trickles on the body seems to give very relaxing and pleasurable feelings to the person. Following the introduction of the Motion Picture Association of America film rating system, independent animation producers attempted to establish an alternative to mainstream animation. A spanking may be carried out with the use of a bare or gloved hand, or with any of a variety of implements, including a paddle, strap, hairbrush, feather duster or belt. Cartoon pornography is the portrayal of illustrated or animated fictional characters in erotic momsex or sexual situations. Biological anthropologist Helen B. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Boots are seen as the hentai sex perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire.