Erotic spankings are commonly combined with other forms of sexual foreplay. Detective magazines, comic books and early fetish magazines In the early 20th century, Detective magazines covertly provided a way of publishing bondage imagery. In recent years, however, many celebrities have benefited from the publicity resulting from the release of a sex tape. Many gay twink porn fantasies include the macrophile shrinking before a normal sized woman or keeping his or her normal height while the partner grows in size. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. 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. Sadism describes sexual pleasure derived by inflicting pain, degradation, humiliation on another 3d hentai person or causing another person to suffer. The loose and direct camera work often includes tight shots of the genitalia, momsex unlike some traditional porn. Reading or viewing pornography, sexual fantasy or other erotic stimuli may lead to a desire for sexual release such as by masturbation. Its gain in prominence has been attributed to its depiction in the film Pecker, which was released in 1998. 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 . People may experience pleasure from anal sex by stimulation of the anal nerve endings, and orgasm may be achieved through anal penetration – by indirect stimulation of the prostate in men, indirect clitoral/G-spot stimulation in women, and associated sensory nerves . Double penetration of the vagina, anus and mouth, can involve: Simultaneous penetration of the anus by two penises or other objects. This is commonly called double vaginal penetration or double stuffing. 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.