The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. The term is typically used by the cinematographer within the narrative framework of a pornographic film, and since the 1970s has become a leitmotif of the hardcore genre. Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. What seems clear from the historical record is that much of the lesbian material in pornographic texts was intended for a male readership. Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. Content featuring male bisexuality has been a growing trend since the advent of internet pornography. Women gaysex oriented pornography is sometimes referred to as sex positive pornography. Pornography may fall into more than one genre. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. Sub-genres can also be classified into the characteristics hentai sex 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 most common type of erotic momsex spanking is administered on the bare buttocks, but can also be combined with bondage, in order to heighten sexual arousal and feelings of helplessness. Lolicon and its contribution to the controversy regarding the regulation of pornography of depicting minors that don’t exist has been a major issue for free speech in and outside of Japan. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms.