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. 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. The consent and compliance for a sadomasochistic situation can be granted only by people who can judge the potential results. The phrase is commonly found on porn sites. There has been an increase in discussion and portrayal of masturbation lesbian milfs in art, popular music, television, films, and literature. This industry employs thousands of performers along with support and production staff. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. The range of its individual characteristics is thereby wide. A crush fetish is a fetish in which one is sexually aroused usually when someone crushes objects, food, and sometimes small animals with their body, usually under their foot, or when crushed oneself. It is sometimes combined with BDSM hentai sex features. BDSM communities generally welcome anyone with a non-normative streak who identifies with the community; this may include cross-dressers, extreme body mod enthusiasts, animal players, latex or rubber aficionados, and others. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, gay movies chest, or breast of another person. 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. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. Snuff pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene.