The definition clash also appears with the English definition of yuri as any lesbian relationship, as opposed to its sexually explicit definition in Japan. If this is done using penises and/or strap-on dildos, this is sometimes called the sandwich or BigMac. However, bisexual pornography is often placed near the gay section in adult video stores, since many consumers are gay men. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Terminology for roles varies widely within the various BDSM subcultures. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . People may engage in anilingus for its own sake, before anal fingering or penetration, or as part of foreplay. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. Simultaneous penetration of the mouth and either the vagina or anus. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Hamedori is a genre of Japanese pornography in which a male adult video actor or director serves as the camera operator. Once insertion is complete, the fingers are either clenched into a fist or hot gay sex kept straight. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. This can, however, redirect semen into the bladder . Real medical 3d hentai shots or videos may violate porn milf privacy laws in some countries. Cuckolding can also be mixed with other non-monogamous relationship arrangements with which it has substantial overlap such as Swinging, wife-swapping, open relationships, and polyamory, etc. There has been an increase in discussion and portrayal of masturbation in art, popular music, television, films, and literature.