The concept of lesbian, to differentiate women with a shared sexual orientation, is a 20th-century construct. The anus has a relatively high concentration of nerve endings and can be an erogenous zone, and the receiver may receive pleasure from external anal stimulation. Cuckold lesbian milfs fetish pornography that involves a cuckolded husband. Mammary intercourse is said by Alex Comfort to produce mutual orgasm in women with sensitive breasts , and it was one of the nine substitute exercises for penetrative sexual activities, as detailed in the Paradis Charnels of 1903. Pornography may be presented in a variety of media, including books, magazines, gaysex postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. Unlike the traditional definition of the term, in fetish usage a cuckold is complicit in their partner sexual infidelity and takes masochistic sexual pleasure in it. They further argue that setting a discrete line between safe and not-safe activities ideologically denies consenting adults the right to evaluate risks vs rewards for themselves; that some adults will be drawn to certain activities regardless of the risk; and that BDSM play—particularly higher-risk play or edgeplay—should be treated with the same regard as extreme sports, with both respect and the demand that practitioners educate themselves and practice the higher-risk activities to decrease risk. Many men who like trans partners of any variety, known as gay hentai tranny chasers, do not necessarily identify as gay themselves. Participants usually derive pleasure from this, even though many of the practices—such as inflicting pain or humiliation or being restrained—would be unpleasant under other circumstances. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating.
