Some people get sexual pleasure by inserting objects, such as urethral sounds, into the gay fuck urethra , a practice known as urethral play or sounding. The most common male masturbation technique is simply to hold the penis with a loose fist and then to move the hand up and down the shaft. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view. Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. The actual height of the giantess within the fantasy may vary depending on the individual. Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal and pleasure from feces. Some are aroused from wetting their diapers, others like messing their diapers. Some may keep their hand stationary while pumping into it with pelvic thrusts in order to simulate the motions of sexual intercourse. Although there may be no connection between coprophilia and sadomasochism , the limited data on gay hentai the former porn milf comes from studies of the latter. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. Certain websites have begun providing bondage videos and photographs featuring the kidnapping roleplay, which has been largely the hallmark of detective style bondage magazines. Voyeur pornography may also include shots of topless women on topless beaches who are unaware of the cameras but may legally be photographed due to the public setting. Tentacle erotica can be consensual, but frequently contains elements of non-consensual sex. Behind the Green Door was one of the first pornographic films to feature sex between a white actress with a black actor . On May 27, 2010 the television program The Doctors discussed the topic with dozens of teens, parents, and professionals.