Bondage websites and bondage imagery in mainstream pornography As of 2003, specialist bondage magazines were mostly displaced by the availability of bondage material on the World Wide Web, and the presence of bondage imagery in mainstream pornographic magazines such as Nugget and Hustler Taboo magazine. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Bestiality is illegal in many countries. For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans. The activity is done by hentai sex itself or as a part of or prelude to other activities which many times involve sex. Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the bed, a partner leg or some scrunched-up clothing and hump the vulva and clitoris against it. It is also known colloquially as gushing or squirting, although these are considered to be different phenomena in some research publications. These styles are much closer to the style of bondage scenes in mainstream television. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish and French colonialism and imperialism and their aftereffects. Crush pornography features objects being crushed by an actress or actor, who generally plays an overtly dominant role. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. Common positions include lying big tit milf on back or face down, sitting, squatting, kneeling or standing. Being forced to wear diapers as a form of humiliation is sometimes a behavior encountered in sexual masochism. The term BDSM dates back to 1969; however, the origin of the term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or gaysex as a compound initialism from B&D, D&S , and S&M.