Threesome or 3some pornography features one man and two women . Some pornographic films use an artificial semen substitute to simulate or enhance creampie shots. Shotacon : Similar to Lolicon, this genre involves prepubescent or under-aged boys between the ages 6–12. Lolita pornography caters to ephebophiles. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Felching is a sexual practice involving the act of orally sucking semen out of the vagina or anus of one partner. Some men enjoy masturbating during pegging. Gay pornography is the representation of sexual activity between males. A person may be sexually penetrated multiple times simultaneously. Among fetishists, the pose of reluctance—the victimization of the cuckold—is a major element of the paraphilia. A scene where many women have sex with one man is referred to as a reverse gang-bang. Works in this genre may explore philosophical, political or social issues. Mammary 3d hentai intercourse has sometimes been considered a perversion. It may occur more frequently in private situations, such as spontaneous sexual activity among three friends, or arranged in a community of like-minded swingers or planned as a once-only experience; and rarely in anonymous settings, such as at orgies or other sex parties. The introduction of the home video and Internet saw a boom in the worldwide porn industry that generates billions lesbian milfs of dollars annually. The initialism BDSM includes psychological and physiological facets: Bondage & Discipline Dominance & Submission Sadism & Masochism Types of Play This model for differentiating among these three aspects of BDSM is increasingly used in literature today. They may be noted for using risqué themes, graphic violence, sexuality or black comedy in a manner that is unsuitable for younger audiences. Boots are seen as the perhaps most fetishistic of all footwear and boots gay twink porn may be the most popular fetish clothing attire.