One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, including unsimulated sex scenes. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Group sex is sexual behavior involving more than two participants. Unlike the traditional definition of the term, in fetish usage a cuckold is complicit in their partner sexual infidelity and takes masochistic hentai porn sexual pleasure in it. 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. Pornographic films are generally classified into sub-genres which describe the sexual fantasy which the film and actors attempt to create. 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, gay sex video often fake. Fisting involves the insertion of one partner entire hand into a vagina or the anal cavity. Snuff nude milfs pornography involves the actual death of any of the participants, consenting or otherwise, simulated death is not considered snuff. Incest pornography can feature actual relatives, but the main type of this pornography simply uses actors of similar looks to suggest family relationship. Heterosexual bareback sex, as opposed to sex with condoms, not only poses an increased risk of STIs, but for pregnancy as well. The name of the practice, when it is done in a repeated in-and-out motion, is derived from its passing resemblance to the dipping of a tea bag into a cup of hot water as a method of brewing tea.