For their consent, they must have relevant information at hand and the necessary mental capacity to judge. In the context of consensual erotic activities, sadism and masochism are not strictly accurate terms; there is a significant difference from the medical or psychological usage of both terms. Technically this is a form of exhibitionism rather than group sex per se. Transsexual pornography features transwomen performers, who typically have male genitalia and augmented female breasts . But starting with 3d hentai The World Biggest Gangbang , starring Annabel Chong, the pornographic industry began producing a series of films ostensibly setting gangbang records for most consecutive sex acts by one person in a short period. Fisting momporn involves the insertion of one partner entire hand into a vagina or the anal cavity. Targets the male audience, but is much less popular than Yaoi. The higher pay scale and profile within a production often leads to group scenes where a straight actor only tops. Bukkake videos are a relatively prevalent niche in contemporary pornographic films. The Japanese sex industry uses the term Paizuri . Insertion in pornography features women inserting various odd objects into their anus or vaginas. Pegging is a recently invented word which features a woman penetrating a man with a strap-on dildo. Erotic spanking is the act of spanking another person for the sexual arousal or gratification of either or both parties. An orgy is a gathering where guests freely engage in open and unrestrained sexual activity or group sex; and a bunga bunga orgy is an orgy in which participants have sex underwater, such as in a swimming pool or a hot tub. Unlike Yaoi, Bara is normally made by actual homosexual men, for homosexual men, and tends to focus on the more realistic obstacles and challenges that come with being homosexual in Japan. It explores the more mental aspect of BDSM. Along with the penis, the scrotum is sensitive and considered to be an erogenous zone. In the 1970s, the hardcore pornography videos gays genre introduced the stereotypical cumshot scene as a central element of the hardcore film, in which the male actor ejaculates in a way ensuring maximum visibility of the act itself.