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. Another variant of reality pornography consists of normal couples that are filmed by professionals, in which case the only obvious distinction from amateur pornography is the higher quality of production, filming and editing. This category also includes pornographic home hentai movies movies. Bisexual pornography gay sex video is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. Sometimes special furniture is used, such as a queening stool or smotherbox. Lucky Pierre is slang for a person performing both receptive and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. Men and women may masturbate until they are close to orgasm, stop for a while to reduce excitement, and then resume masturbating. 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. This style of filming is in contrast to having a separate, lesbian milfs third-person camera crew filming all the action. Twink pornography features younger performers, and usually features young men under 30 who identify as gay or bisexual. Such films continued to be produced but could only be distributed by underground channels. Insertion in pornography features women inserting various odd objects into their anus or vaginas. Squirt pornography involves women ejaculating. Sexual scenarios may involve male domination, female submission, exhibitionism and erotic entertainment. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. 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.