Some women who engage in same-sex sexual activity may reject not only identifying as lesbians but as bisexual as well, while other women self-identification as lesbian may not align with their sexual orientation or sexual behavior; sexual identity is not necessarily the same as one sexual orientation or sexual behavior, due to various reasons, such as the fear of identifying their sexual orientation in a homophobic setting. Although interracial pornography theoretically can apply to depictions of sexual activity between performers of any different racial groups, the term is most commonly used for heterosexual sex acts between black and white performers. This industry employs thousands of performers along with support and production staff. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. 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 hentai porn when crushed oneself. On May 27, 2010 the television program The Doctors discussed the topic with dozens of teens, parents, and professionals. Examples include the Girls Gone Wild and Girls Who Like Girls Series. Evolutionary psychologists suggest that rounded buttocks gay sex video may have evolved to be momporn desirable trait because they provide a visual indication of the woman youth and fertility. Multiple men and women Bisexual pornography features one woman and two men who all perform sex acts on each other. Gay-for-pay describes male or female actors, pornographic stars, or sex workers who self-identify as heterosexual but who are paid to act or perform as homosexual professionally. Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. Femdom features BDSM scenes in hentai porn videos which the dominant partner is female.