Group sex is sexual behavior involving more than two participants. Bisexual pornography is a genre of pornography which most typically depicts one woman and two men who all perform sex acts on each other. Shibari is a Japanese word that literally means to tie or to bind. Twink pornography features younger performers, and usually features young men under 30 who identify as gay or bisexual. The definition clash also appears with the English definition of yuri as any hentai porn lesbian relationship, as opposed to its sexually explicit definition in Japan. Sex experts have praised various techniques that the performer can use during fellatio to increase gay boy porn their partner pleasure. A few extremely flexible males can reach and stimulate their penis with their tongue or lips, and so perform autofellatio. Kinbaku means tight binding Kinbaku-bi which literally means the beauty of tight binding. 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. A pearl necklace is a slang term referring to a sexual act in which a man ejaculates semen on or near the neck, chest, or breast of another person. Facial cum shots are currently regularly portrayed in pornographic films and videos, often as a way to close a scene. Reflective of its views on sexuality and culture, Japanese pornography delves into a wide spectrum of heterosexual, homosexual, and momsex transgender sexual acts in addition to unique fetishes and philias. A celebrity may allow such a recording to surface willingly, as part of a publicity stunt. One or more of the participants may engage in autoerotic sexual activity, such as masturbation, possibly without physical contact with the other participants. Transsexual people Transman pornography features performers who were born female and who medically transitioned to male. Pornography is generally classified as either softcore or hardcore pornography. Pornography in the early 2000s. Using the term shemale for a transsexual woman often implies that she is working in the sex trade.