The speed of the hand motion will vary from person to person, although it is not uncommon for the speed to increase as ejaculation nears and for it to decrease during the ejaculation itself. Lesbian pornography made for women is usually made by women, and usually features women who nude milfs identify as lesbian or bisexual. There were also a very limited number of specialist fetish magazines which featured images of bondage, such as the famous Bizarre magazine published from 1946 to 1959 by the pioneering fetish photographer John Willie, and ENEG Exotique magazine, published 1956-1959. This style of filming is in contrast to having a separate, third-person camera crew filming all the action. In the 1970s, the hardcore pornography 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. In many cases, that person is also aroused by smelling body parts that have a urine scent. For other diaper fetishists, simply wearing a diaper, the bulking feeling and crinkling sounds associated with it, is enough to cause the fetishist a form of erotic pleasure or sexual arousal. Generally, interest differs between people, and gender depends on sexual orientation. A large part of the popularity of these videos is seeing how regular and normal the girls are in real-life. The first film was released in 1980 starring Kay Parker. The term hentai is never used in this context in Japanese. The nipples are erogenous zones, and vigorous stimulation of them during masturbation usually causes the penis to become erect more quickly than it would otherwise. Watersports pornography features lesbian hentai sexual activities involving urine, such as golden showers. 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. For other scenes, particularly in established relationships, videos gays a safeword may be agreed to signify a warning rather than explicit withdrawal of consent; and a few choose not to use a safeword at all.