The use of the word creampie to describe such 3d hentai scenes originated in U. Pornography may be presented in a variety of media, including books, magazines, postcards, photographs, sculpture, drawing, painting, animation, sound recording, film, video, and video games. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Sometimes one or more fingers may be inserted into the vagina to stroke its frontal wall where the G-spot may be located. Both sexes sometimes apply lubricating substances to intensify sensation. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view. Some men also enjoy anal stimulation, with fingers or otherwise, without any prostate stimulation. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated gaysex or jumbled . Particular areas and processes of the body that change during pregnancy may also become the focus of psychological investment, but nudity or sexual activity is not always essential, and in some cases actual pregnancy is not necessary horny milfs to invoke arousal. Threesome can also refer to a love triangle, a three-way romantic relationship. Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an orgasm. Individuals are also sometimes abbreviated when referred to in writing, so a dominant person may be referred to as a Dom for a man, and a Domme for a woman. In modern BDSM vernacular, the queening stool allows open access to the crotch while seated. The name was coined from the title of the controversial book. Pro-am pornography is sub-genre of amateur pornography that refers to professionally made porn that features amateur actors/actresses, often appearing for the first time in a pornographic film.