John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Is also common of the furry genre. The name was coined from the title of the controversial book. The actual height of the giantess within the fantasy may vary depending on the individual. A celebrity can fight the release in court to maintain deniability while still enjoying the career benefits. Since mammary intercourse is a non-penetrative sex act, the risk of passing a sexually transmitted infection that requires direct contact between the mucous membranes and pre-ejaculate or semen is greatly reduced. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. Works in this genre may be considered adult for any number of reasons. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. It has also been recommended gay black porn as a form of foreplay or safer sex. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. Portrayals of lesbians in the media suggest that society at large has been simultaneously intrigued and threatened by women who challenge feminine gender roles, and fascinated and appalled with women who are romantically involved with other women. 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.