The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. Sadomasochism does not imply enjoyment through causing or receiving pain in other situations . Women porn is often produced by women and aimed specifically at the female market - rejecting the view that men are turned on by porn but women only by a box of chocolates. Shibari is a Japanese word that literally means to tie or to bind. Watersports pornography features sexual activities involving urine, such as golden showers. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. The interaction between tops and bottoms—where physical or mental control of the bottom is surrendered to the top—is sometimes known as power exchange, whether in the context of an encounter or a relationship. Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. Especially popular in post-World War 2 Japanese culture. 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. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. This is commonly called double anal or double stuffing. Amateur porn has been called one of the most profitable and long-lasting genres hentai porn of pornography. Pornography gay bear porn is often referred to as porn milf xxx and a pornographic work as a porno. Originating in Japan in the 1980s, the genre subsequently spread to North America and Europe, and crossed over into gay pornography. After the prerequisite level of sexual stimulation has been achieved, and ejaculation becomes imminent, the male will position his penis so that the semen discharged will be deposited onto his partner face. Softcore pornography generally contains nudity or partial nudity in sexually suggestive situations, but without explicit sexual activity, sexual penetration or extreme fetishism, while hardcore pornography may contain graphic sexual activity and visible penetration, videos gays including unsimulated sex scenes.