Typically featured are hitting, naked milf choking, name-calling and hair-pulling. A sex party is a gathering at which sexual activity takes place. In Japan, point of view pornography is referred to as hamedori . In POV porn, the shooting style is generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act. Threesome can also refer to a love triangle, a three-way romantic relationship. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Participants who exert sexual control over their partners are known as dominants or tops while participants gay cock who take the passive, receiving, or obedient role are known as submissives or bottoms. Preggo pornography features pregnant performers hentai porn and may include erotic lactation as a fetish. Examples of heterosexual pornographic film series featuring creampies include Cream Filled Teens and Internal Cumbustion. Lolita pornography features women who are 18 years old or slightly older, who pretend to be underage teen girls. Because the viewing of such films carried a social stigma, they were viewed at brothels, adult movie theaters, stag parties, at home, in private clubs and also at night cinemas. The actual height of the giantess within the fantasy may vary depending on the individual. Films with risqué content commenced to be produced soon after the invention of the motion picture in the 1880s. Femdom features BDSM scenes in which the dominant partner is female. Group sex most commonly takes place in a private sex party or semi-public swinger gathering, but may also take place at massage parlors or brothels or, in some jurisdictions, at purpose-built locations such as sex clubs. New York photographer Irving Klaw also published illustrated adventure/bondage serials by fetish artists Eric Stanton, Gene Bilbrew, Adolfo Ruiz and others.