A male voyeur is commonly labeled Peeping Tom, a term which originates from the Lady Godiva legend. Several hundred exclusively pegging films were produced, as well as twice as many bisexual and straight films with strap-on scenes. A somewhat controversial ejaculation control technique is to put pressure on the perineum, about halfway between the scrotum and the anus, just before ejaculating. As of 2013, little analysis of this paraphilia has been reported in medical literature. The original definition of dogging – and which is still a closely related activity – is spying on couples having sex in a car or other public place. The name is a reference to gonzo journalism, in hentai movies which the reporter is part of the event taking place. It is suggested that much of the obscurity and the uncertainties about female ejaculation are related to mixing up these two phenomena. Sex parties may be organized to enable people to engage in casual sexual activity or for swinging couples or people interested lesbian milfs in group sex to meet, but any gathering where sexual activity is anticipated can be called a sex party. Even though the performers who perform in these films typically appear on many reality websites within a short span of time, most of these websites claim that each of them is an amateur. Diaper pornography involves performers wearing porn cartoon diapers, sometimes with an adult performer acting in the role of a caretaker. Normal quantities of ejaculate range from 1.5 to 5.0 milliliters . Starting with erotic stories and woodblock gay movies prints from before celebrity sex tapes the 20th century, Japanese pornography evolved into distinct subcategories with the media that in addition of pornographic videos and magazines featuring live actors, there is exist categories of pornographic manga , pornographic computer games , and pornographic anime . 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.