BDSM naked celebrities has become an umbrella term for certain kinds of erotic behavior between consenting adults. In the United States, creating, distributing, or possessing crush videos has been illegal since 1999, and many other countries also have banned them. Exhibitionist pornography features performers, usually female exposing themselves in public and spans simple flashing to public sex. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. Sometimes, asymmetric and often intentionally uncomfortable positions are employed to heighten the psychological impact of the bondage. Technically this is a form of exhibitionism rather than horny milfs group sex per se. With second wave feminism and growth of scholarship in women history and sexuality in the 20th century, the definition of lesbian broadened, sparking a debate about sexual Black Porn desire as the major component to define what a lesbian is. It may also involve gay bear porn touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Erotic literature and pornographic films have been devoted to the sexual uses of glory holes. Foot fetishism, foot partialism, foot worship, or podophilia is a pronounced sexual interest in feet. It is also often mixed with other fetishes in practice, such as voyeurism, hentai sex denial, etc. In straight pornography, intercourse is often followed by a facial, pearl necklace or other visible ejaculation. An orgy is a gathering where guests freely engage in open and unrestrained sexual activity or group sex; and a bunga bunga orgy is an orgy in which participants have sex underwater, such as in a swimming pool or a hot tub. However the genre remains a very small celeb gossip proportion of the pornographic DVD market; for example at porn retailer HotMovies. As observation is encouraged, voyeurism and exhibitionism are closely associated with dogging.