In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Sub-genres can also be classified into the characteristics of the performers or the type of sexual activity on which it concentrates, and not necessarily on the market to which each sub-genre appeals. The industry generally refers to such films as adult films, which is part of adult entertainment. Normal quantities of ejaculate range from 1.5 to 5.0 milliliters . Women who perform in lesbian pornography often do not consider themselves lesbian or bisexual. Target audience are teenage / young adult women. Bestiality is illegal in many countries. The use of the word creampie to describe such scenes originated in U. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. Sometimes one or more fingers may be inserted into the vagina to stroke its frontal wall where the G-spot may be located. It is geared towards heterosexual men, who most typically define a threesome as such. Adult animation is genre of animation geared towards adults and sometimes teens. Bondage pornography specializes in the depiction of sexual bondage or BDSM activities as photographs, stories, movies, or mature milfs drawings. Incest itself is largely taboo, and is a crime in many countries. In Japanese, this natural-fibre rope is known as asanawa; the Japanese vocabulary does not make a distinction between hemp and jute. Clothed male, naked female is one-sided female nudity in which one or more females are nude while one or more men are clothed. Among swinging couples, one of the two partners is often the driving force and the other is more passive-supportive of the addition of additional sex parties. Many cultures describe pain as an aphrodisiac. Yaoi is anime or manga that features hentai videos gay males . Commenting on why there are not as many female macrophiles, gaysex psychologist Helen Friedman theorized that because women in most societies already view men as dominant and powerful, there no need for them to fantasize about it.