Especially popular in post-World War 2 Japanese culture. 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 . This may help them develop their orgasm, increase its pleasure, and may inspire them to masturbate on a more frequent mature milfs basis. For legal reasons, the vast majority gay fuck of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Clothes wetting: The person is sexually aroused by wetting one clothing or observing another person doing so. BDSM actions can often take place during a specific period of time agreed to by both parties, referred to as play, a scene or a session. Pornography is often referred to as porn and a pornographic work as a porno. A variant of A2M is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth. Pornography is generally classified as either softcore hentai videos or hardcore pornography. Unlike erotic films, pornographic films contain explicit sexuality and do not claim any artistic merit. For uncircumcised males, stimulation of the penis in this way comes from the pumping of the foreskin, in which the foreskin is held and slid up and down over the glans, which depending on foreskin length, is completely or partially covered and then uncovered in a rapid motion. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Generally, interest differs between people, and gender depends on sexual orientation. This style of filming is in contrast to having a separate, third-person camera crew filming all the action. 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.