Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. They further argue that setting a discrete line between safe and not-safe activities ideologically denies consenting adults the right to evaluate risks vs rewards for themselves; that some adults will be drawn to certain activities regardless of the risk; and that BDSM play—particularly higher-risk play or edgeplay—should be treated with the same regard as extreme sports, with both respect and the demand that practitioners educate themselves and practice the higher-risk activities to decrease risk. If this is done using penises and/or strap-on dildos, this is sometimes called the sandwich or BigMac. In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. The genres of pornography are based on the type of activity featured and the category of participants, for example mateur pornography is a category of pornography that features models, actors or non-professionals performing without pay, or actors for whom this material is their only paid modeling work. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Each participant may engage in any type of sex acts with one or both of the others, such as vaginal, anal or oral sex or mutual masturbation. In hentai sex academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. Reality pornography is professionally made porn which seeks to emulate the style of amateur pornography. Both forms of pornography generally contains nudity. Participants usually derive pleasure from this, even though many of the practices—such as inflicting pain or humiliation videos gays or being restrained—would naked milf be unpleasant under other circumstances. English adopts and uses hentai as a genre of pornography by the commercial sale and marketing of explicit works under this label.