Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. Group sex pornography features at least two men and two women , usually more, who all perform sex acts on mature milfs each other. Rainbow party A rainbow party is an urban legend spread from the early 2000s. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal and pleasure from feces. Sigmund Freud considered foot binding as a form of fetishism. Types of anal sex can also be a part of lesbian sexual practices. A celebrity can fight the release gaysex in court to maintain deniability while hentai sex still enjoying the career benefits. The naked appearance of actress Demi Moore in the advanced stage of pregnancy on the cover of Vanity Fair magazine in 1991 marked the beginning of a period which has since seen pregnancy presented by celebrities as a glamorous state of living, while also creating a market for photographers to produce images of pregnant mothers, and for fashion stylists to introduce pregnancy styling to their business. Perhaps following the example set by gay pornography, they have become a popular subgenre within heterosexual pornography since the turn of the century, featuring both vaginal and anal ejaculations. 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. Hermaphrodite, also known as herm, refers to pornography, typically hentai, that features persons with the genitalia of both sexes. Is also common of the furry genre. A study of the condom usage habits of New Zealand sex workers said that they offered various safe sex alternatives to vaginal sex to clients who refused to wear a condom.