Pornography in Japan is large and intertwined business of adult entertainment with unique characteristics that readily distinguish it from western pornography. Rape pornography features performers simulating rape. Sexual relations between women have been illustrated as well as narrated, but much of the written material from the early modern period has been destroyed. Some do not use the diapers at all, for arousal, or bladder and bowel movements. Mutual masturbation can be practiced by males or females in pairs or groups with or without actually touching another person as indicated by the following examples of contact versus non-contact scenarios: Non-contact mutual masturbation hot gay sex Two people masturbating in the presence of each other but not touching. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. Since development and pronunciation of the buttocks begins at menarche and milf xxx declines with age, full buttocks are also a symbol of youth. 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 anime hentai 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. Is also common of the furry genre. Actual upskirt or downblouse shots may violate privacy laws in some countries. This can, however, redirect semen into the bladder . Though there have been numerous gang bang pornographic films since the 1980s, they usually involved no more than half a dozen to a dozen men. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals .