Simultaneous penetration of the mouth and either the vagina or anus. Tentacle rape or shokushu goukan is found in some horror or hentai titles, with tentacled creatures having sexual intercourse with female characters. The anus has a relatively high concentration of nerve endings and nude milfs can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse. Asian people or Asiatic people are people who descend from a portion of Asia population. Strictly speaking, bondage means binding the partner by tying their appendages together; for example, by the use of handcuffs or by lashing their arms to an object. Currently, animated television series aimed at adults are some of the most popular and critically acclaimed forms of entertainment. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Freud, however, considered such extensions of sexual interest to fall within the range of the normal, unless marked out by exclusivity . Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games. For other scenes, particularly in established relationships, a safeword may be agreed to signify a warning rather than explicit withdrawal of consent; anime hentai and a few choose not to use a safeword at all. Bisexual DVDs sell much better online than in adult video stores, possibly due to customers in stores feeling embarrassed to buy them. Bukkake, Gokkun, Omorashi, and tentacle erotica are few uniquely Japanese genres known to western viewers. It is mutual consent that makes a clear legal and ethical distinction between BDSM and such crimes as sexual assault or domestic violence. It may be used as foreplay, or videos gays as an alternative to sexual penetration. However the genre remains a very small proportion of the pornographic DVD market; for example at porn retailer HotMovies.