There may be more than two participants; both group sex and gang banging can be included. The term hentai is never used in this context in Japanese. Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Kinbaku gay bear porn means tight binding Kinbaku-bi which literally means the beauty of tight binding. Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly. The original definition of dogging – and which is still a closely related activity – is spying on couples having sex in a car or other public place. Rape pornography features momsex performers simulating rape. The prostate gland is one of the organs that contributes fluid to semen. Other possibilities are possible, such as a man having sex with two women who are having sex with each other. Threesome can also refer to a love triangle, a three-way romantic relationship. The term lesbian is also used with regard to sexual identity or sexual behavior, regardless of sexual orientation, or as an adjective to characterize or associate nouns with female homosexuality or same-sex attraction. Interracial pornographic films have experienced an explosion in popularity, becoming one of the fastest-growing and biggest-selling genres. Commercialized pornography accounts for a nearly US0 billion worldwide industry for the production of various media and associated products and services. Pegging is a sexual practice in which a woman performs anal sex on a man by penetrating the man anus with a strap-on dildo. Because the viewing of lesbian hentai 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. Urolagnia is a form of salirophilia in which sexual excitement is associated with the sight or thought of urine or urination.