The 1979 U. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. Some productions are noted for sophisticated and/or experimental storytelling and hentai porn animation techniques. Reality Reality pornography refers to real or faked amateur encounters. In many cases, that person is also aroused by smelling body parts that have a urine scent. 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. Masturbation has been depicted in art since prehistoric times and is mentioned and discussed in very early writings. While most tentacle erotica is animated, there are also a few live-action movies. Not all crush fetishists are porn milf that extreme! Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. A common way that these are depicted in a single scene is with one woman and two men performing together. 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 gay cock photographer John Willie, and ENEG Exotique magazine, published 1956-1959. Arguably the most famous example of the genre is the Taboo series. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. Squirt pornography involves women ejaculating. It may also involve touching, rubbing, or pinching the nipples or other erogenous zones while masturbating. Insertion in pornography features women inserting various odd objects into their anus or vaginas. A variant of this is known as ATOM or ATOGM where the insertive partner removes his penis from one recipient anus and inserts it into a second recipient mouth. They may repeat this cycle multiple times.