These actors often gaysex play the top roles but this is not always the case, such as with Kristen Bjorn and some Bel Ami models. The term sadomasochism is derived from the words sadism and masochism . The term has origins in the Greek language . Kurt Wild, who appeared as a bottom in Lucas Entertainment Gigolos, is married to a woman and has three children. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Some anthropologists and sociobiologists believe that breast fetishism derives from the breasts similarity to buttocks, but instead provide sexual attraction from the front of the body. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. Lolita pornography caters to ephebophiles. Certain websites have begun providing bondage videos and photographs featuring the kidnapping roleplay, which has been largely the hallmark of detective style bondage magazines. Most bisexual porn is made by small production companies rather than the major studios. Some are aroused from wetting their diapers, others porn milf like messing their diapers. 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 . Barebacking usually refers to a conscious lesbian hentai and deliberate choice to forgo condoms. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. When the interest in a particular subject is obsessive, the behavior may be described as stalking. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery.