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. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing lesbian milfs attire. This genre also features male-on-male fellatio through a small hole made in a bathroom divider. This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. Internationally, hentai is a catch-all term to describe a genre of anime and manga pornography. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. The strategies and tactics that are used to smuggle one of the couple into and out of the toilet undetected are as important or almost as important as the urination. These styles are much closer to the style of bondage scenes in mainstream television. The term sadomasochism is derived from the words gay twinks sadism and masochism . John Stagliano is considered to have started the gonzo pornography genre with his Buttman series of films. Older names for a pornographic film include stag film, hentai sex and blue movie. Testosterone discourages fat storage in these areas. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18.