Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. Babysitter pornography features usually teenage girls being exploited and having taboo sex with older, male employers. Pornographic films present sexual fantasies and usually include erotically stimulating material hentai movies such as nudity. Transsexual porn star Wendy Williams has stated that transsexual porn is classified as Straight Specialty. Saliva pornography involves salivation and milf fuck saliva. Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. Others may also use vibrators and other sexual devices more commonly associated with female masturbation. Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume gay twinks masturbating. Examples include the Girls Gone Wild and Girls Who Like Girls Series. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, or attraction to particular stages of pregnancy such as impregnation or childbirth. Although pornography has usually focused on heterosexuality, due to the prevalence of the heterosexual orientation, explicit gay material has a long history as well, which reaches back to Greek antiquity, if not to prehistory. Women in homosexual relationships responded to this designation either by hiding their personal lives or accepting the label of outcast and creating a subculture and identity that developed in Europe and the United States. It like associating every Christian with the zealots who cause religious wars. This category also includes pornographic home movies. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing. Bareback sex is physical sexual activity, especially sexual penetration, without the use of a condom.