Swinging can take gay bear porn place in various contexts, ranging from a spontaneous sexual activity at an informal social gathering of friends to a regular social gathering in a sex club or residence. The slave is usually strictly forbidden from placing their lips directly on the body of the dominant so the practice routinely involves them receiving much of the spray all over their face, hair and body, however, another way of doing this that applies mostly to male dominants, is to place the mouth on the head of the penis and drink the urine as it is released. People may also find masturbating with friends helps lift the stigma they feel surrounding the act. The word shibari came into common use in the West at some point in the 1990s to describe the bondage art Kinbaku. Behind the Green Door was one of the first pornographic films to feature sex between a white actress with a black actor . Particularly, some pornography in this genre features butch women, who are almost never seen in hentai sex mainstream pornography. The choice of position takes into account the spankee comfort in the position for long periods of time, the spanker ability to swing at the spankee at a comfortable, natural angle, complete access to the spankee buttocks, the spanker control of the spankee position and ability to read just as necessary, safety, and the amount of strength the top is able to generate from such a position. A 2009 study found that heterosexual male fat admirers preferred females that were clinically overweight and rated both overweight and obese women more positively milf xxx than slighter individuals. One sex worker said that mammary intercourse was one alternative used; mammary intercourse performed by a woman with large breasts felt to the client like penetrative vaginal sex. A scene where many women have sex with one man is referred to as a reverse gang-bang. Pegging films include Strap It On , Babes Balling Boys , Strap Attack, Strap-on Sirenz, Strap-on Chicks, Boss Bitches , various movies produced by LEDA Studios, and San Francisco-based Men In Pain.