Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm. Threesome can also refer to a love triangle, a three-way romantic relationship. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Today, religions vary in their views of masturbation; some view it as a spiritually detrimental practice, some see it as not spiritually detrimental, and others take a situational view. Snowballing or snowdropping is the human sexual practice in which one person takes someone else semen into his or her mouth and then passes it to the mouth of the other, usually through kissing. This type of pornography is almost exclusively hentai, as true hermaphroditic humans are not fertile and are not usually found in nature. Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. The most common male masturbation technique is simply to hold the penis with a loose fist and then to move the hand up and down the shaft. When used as an alternative to penile-vaginal penetration, the goal may be to preserve virginity or to prevent pregnancy. The loose and direct camera work often includes tight shots of the genitalia, unlike some traditional porn. What seems clear from the historical record gay cock is that much of the lesbian material in pornographic texts was intended for a male readership. Sometimes one or more fingers may be inserted into the vagina to stroke its frontal wall where the G-spot may be located. On May 27, 2010 the television milf fuck program The Doctors discussed the topic with dozens of teens, parents, and professionals. A bisexual threesome may involve a man having sex with a man and a woman, the woman hentai videos having sex with a man and a woman, or all three having sex with each other. Preggo pornography features pregnant performers and may include erotic lactation as a fetish.