Diaper pornography involves performers wearing diapers, sometimes with an adult performer acting in the role of a caretaker. It is mutual consent that makes a clear legal and ethical distinction between BDSM and such crimes as sexual assault or domestic violence. These scenes may either have the cameraman directly engaging in sex or merely filming others having sex. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider. This technique may include the use of a simulacrum, or artificial porn milf vagina. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Individuals are also sometimes abbreviated when referred to in writing, so a dominant person may be referred to as a Dom for a man, and a Domme for a woman. The term applies to the depiction of the act rather than the act itself, and so does not include live exhibitions like sex shows and striptease. Bondage/BDSM Bondage pornography features performers tied up or constrained in various ways. Snuff pornography involves the actual death of any of the participants, consenting hentai movies or otherwise, simulated death is not considered gay sex video snuff. The reverse of this, in which nude women interact with clothed men, is called Clothed male, naked female . Mutual masturbation is a sexual act where two or more people stimulate themselves or one another sexually, usually with the hands. Normal quantities of ejaculate range from 1.5 to 5.0 milliliters . Since at least 1973, it has also been used to refer to a sexually attractive young woman. The rise of the Internet in the late 1990s and early 2000s similarly changed the way pornography film was distributed and furthermore complicated the censorship regimes around the world and the legal prosecution of obscenity. Pregnancy fetishism is a naked celebrities context where pregnancy is seen by individuals or cultures as an erotic phenomenon. Body parts including fingers, tongue and penis may be used for anonymous oral, vaginal and/or anal intercourse.