Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. Some techniques which may work for one individual can be difficult or uncomfortable for another. Teacher and Student or Boss and Secretary pornography involves sexualized situations which take place between an authority figure, such as a teacher or boss, and an underling, such as a student or secretary, often fake. Pornography is generally classified as either gay twinks softcore or hardcore porn milf pornography. It is commonly depicted in pornography, but very rarely in mainstream cinema. Pornographic films present sexual fantasies and usually include erotically stimulating material such as nudity. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. A sub-set of vaginal fisting attempts to photograph the female cervix immediately after the fist is removed from the now-gaping vagina. Actual spying may violate privacy and/or trespassing laws in many countries. A common way that these are depicted in a single scene is with one woman and two men performing together. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . When he is in position the cover is closed. There were also a very limited number of specialist fetish magazines which featured images of bondage, such as the famous Bizarre magazine published from 1946 to 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. They cited the Internet and text messaging as common ways of organising hentai sex meetings. Depictions of male and female masturbation are common in pornography, including gay pornography. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person.