Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and transgender sexual acts in addition to unique fetishes and philias. The existence of such content in commercially available pornography is widely considered an urban legend. Bara male homosexual hentai designed to appeal to men. It is used, hot gay sex for example, at fertility clinics to stimulate naked milf sperm donors. The person receiving anilingus is regarded as the passive partner in the act, and the person performing anilingus is the active partner. The buttocks in human females thus contain more adipose tissue than in males, especially after puberty. A celebrity gay hentai may allow such a recording to surface willingly, as part of a publicity stunt. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals . Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an orgasm. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. The smotherbox is placed on a stable surface. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. Animal masturbation has been observed in many species, both in the wild and in captivity. 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. For much of the history of cinema and television, lesbianism was considered taboo, though since the 1960s it has increasingly become a genre in its own right.