A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then shuttle them back and forth. Examples include the Girls Gone Wild and Girls Who Like Girls Series. When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Depictions of male and female masturbation are common in pornography, including gay pornography. These agreements are binding in the sense that the parties have the expectation that the negotiated rules will be followed. They cited the Internet and text messaging as common ways of organising meetings. 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. It may involve sexual attraction to women who are pregnant or appear pregnant, attraction to lactation, hentai sex or attraction to particular stages of pregnancy such as impregnation or childbirth. Consent is the most important criterion here. This technique may include the use of a simulacrum, or artificial vagina. Greater economic and social freedom allowed them gradually to be able to determine how they could form relationships and families. 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. Since at least 1973, it has also been used to refer to a sexually attractive young woman. Performers are usually clean-shaven, thinner lesbian milfs and more effeminate than ones in mainstream gay pornography. First found in softcore movies and erotic thrillers, gay sex video depictions of lesbianism entered mainstream cinema in the 1980s. Gloryhole pornography features women performing fellatio on unidentified men through a small hole made in a bathroom divider. The stimulation may involve hands, fingers, everyday objects, sex toys or combinations of these.