Some may keep their hand stationary while pumping into it horny milfs with pelvic thrusts in order to simulate the motions of sexual intercourse. Solo performances in gay pornography have been described in 1985 as either or both active and/or passive , whereas female solo performances are said to be exclusively passive . 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. A study of 164 males in Finland from two SM clubs found that 18.2% had engaged in coprophilia; 3% as a sadist, 6.1% as a masochist, and 9.1% as both. 18% of heterosexuals and 17% of homosexuals in the study pool had tried coprophilia, showing no statistically significant difference between heterosexuals and homosexuals. In the West, masturbation in private or with a partner is generally considered a normal and healthy part of sexual enjoyment. This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. Spanking can be administered gay bear porn in a number of spanking positions. While anal sex is commonly associated with male homosexuality, research shows that not all gay males engage in anal sex and that it is not uncommon in heterosexual relationships. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. They may be noted for using risqué themes, 3d hentai graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. Exhibitionism: Becoming noticeably desperate or wetting oneself with the express purpose of being seen by strangers. They may regard it as an enhancing element of their sex lives or as their primary form of sexual activity. The existence of such content in commercially available pornography is widely considered an urban legend.