Lesbianism in erotica deals with depictions in the visual arts of lesbianism, which is the expression of female-to-female sexuality. Real school shots or videos which are sexualized may violate privacy laws in some countries. A person may be sexually penetrated multiple times simultaneously. Many times a top actor will then be sought as a bottom and the debut is often treated as a notable event or even its own release. Low et al. Penetration may involve 3d hentai use of fingers, toes, sex toys, or penises. Yuri : Featuring two grown adult women in a homosexual/lesbian relationship. It is typically animated pornography, as the legal age to be featured in a pornographic film in Japan is 18. The introduction of the home video and Internet saw a boom in the worldwide porn industry that generates billions of dollars annually. Particularly, some pornography in this genre features butch women, who are almost never seen in mainstream pornography. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Studies among BDSM practitioners in the US have shown that about half of all men find the idea of bondage to be erotic; many women do as well. A celebrity sex tape is typically an amateur pornographic video recording involving one or more celebrity famous person which has, intentionally or unintentionally, been made available publicly. Bra pornography gay fuck involves women or men dressed in bras. Reality pornography is a genre of pornography where staged scenes, usually shot in cinéma vérité fashion, set up and precede sexual naked milf encounters. Drama Hardcore showed this kind of film on its film. A celebrity can fight the release in court to maintain deniability while still enjoying the career benefits. In Japanese, the term describes any type of perverse or bizarre sexual desire or act; it does not represent a genre of work.