Content featuring male bisexuality has been a growing trend since the advent of internet pornography. The cover can have hinges or be a separate part. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls. Lolita pornography caters to ephebophiles. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on each other. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. On May 27, 2010 the television program The Doctors discussed the topic with dozens of teens, parents, and professionals. Oral sex pornography frequently features a person performing fellatio, and less frequently cunnilingus. For some people, non-penetrative sex is the primary sexual activity of choice above all others. Clothed male, naked female is one-sided female nudity in which one or more females are nude while one or more men are clothed. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. The first explicit pegging scene is believed to have been in the 1975 pornographic film The Opening of Misty Beethoven. Likewise, Fox Broadcasting Company has also dedicated an entire evening programming block to adult animation programs, known as Animation Domination. Works in this genre may be considered adult for gay bear porn any number of reasons. Women with women Main article: Lesbianism in erotica: Lesbianism in contemporary pornography Lesbian or girl-girl pornography features women engaged in sex together, but is typically aimed at a male audience. Most bisexual porn is made by small production companies rather than the major studios. Works in this genre may explore philosophical, gay hentai political or social issues. Breast fetishism is big tit milf a paraphilic sexual interest focused on female breasts . The use of the word creampie to describe such scenes originated in U.