A bisexual threesome may involve a man having sex with a man and a woman, the woman having sex with a man and a woman, or all three having sex with each other. The name was coined from the title of the controversial book. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. If one person is penetrated by two objects, it is generically called double penetration . Examples of mentally oriented practices are education games, during mature milfs which the dominant requires certain forms of behavior from the submissive. Irrespective of the legal or social view of pornography, it has been used in a number of contexts. The niche popularity grew significantly in the latter half of the first decade of the 2000s. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. The queening stool is also related to a smotherbox, which also allows the person under the seat to be locked in place, restrained by the neck as in a set of stocks. In the gay pornography industry, which uses amateurs as well as professional actors, the term gay-for-pay refers to actors labeled or believed to be straight but who engage in same-sex sexual activities for money. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Likewise, gay bear porn Fox Broadcasting Company has also dedicated an entire evening programming block to adult animation programs, known as Animation Domination. Yuri female homosexual hentai. Bukkake pornography involves a performer, usually female, onto whom several men or women ejaculate, usually on the face. Commenting on why there are not as many female macrophiles, psychologist Helen Friedman theorized that because women in most societies hentai movies already view men as dominant and powerful, there no need for them to fantasize about it. 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 as a compound initialism from B&D, D&S , and S&M.