It explores the more mental aspect of BDSM. Bukkake videos are a relatively prevalent niche in contemporary pornographic lesbian hentai films. It generally contains nudity or partial nudity in sexually suggestive situations. Also see POV. This scene dynamic may be referred to as consensual nonconsent. In some areas, there are laws stating it is not legally possible to consent to be killed, and elsewhere it may still be legally dubious . In recent years, Japanese films of this genre have become more common in the USA and Europe although it still remains a small, fetish-oriented part of the adult film industry. The term bareback is used less frequently in the heterosexual community. For their consent, they must have relevant information at hand and the necessary mental capacity to judge. The term hamedori came into use about 1988–1989, but it was only a small niche area until it was popularized at V&R Planning by director Company Matsuo. Fisting, handballing, fist-fucking, brachiovaginal, or brachioproctic insertion is a sexual activity that involves inserting a hand into the vagina or rectum. There is a substantial amount of incest pornography on the Internet, leading some to argue it may legitimize or encourage real-life incest. Bondage is usually, but not always, a sexual practice. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Simultaneous penetration of the vagina by two penises or other objects. The effect is to give the viewer the sense that they are experiencing the sex acts that they are watching, as opposed gay movies to simply watching others as a voyeur. Anti-pornography psychologist Ana Bridges and colleagues conducted a content analysis of best-selling heterosexual pornographic videos showing that over 96% of all scenes concluded with a male performer ejaculating onto the body of his female partner. For example, the Kama Sutra, in particular, goes into specific detail on how to properly strike lesbian milfs a partner during sex.