The glans itself may widen and lengthen momporn as the stimulation continues, becoming slightly darker in colour, while the gliding action of the foreskin reduces friction. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result. The volume of semen that is ejaculated depends on several factors, including the male health, age, degree of sexual excitement, and the time since his last ejaculation. Pegging films include Strap It On , Babes Balling Boys , Strap Attack, Strap-on Sirenz, Strap-on Chicks, Boss Bitches , various movies produced by LEDA Studios, and San Francisco-based Men In Pain. Reality and voyeur pornography, animated videos, and legally prohibited acts also influence the classification of pornography. Gonzo pornography is a style of pornographic film that gay movies attempts to place the viewer directly into the scene. Boots are seen as the perhaps most fetishistic of all footwear and boots may be the most popular fetish clothing attire. Voyeurism is the sexual interest in or practice of spying on people engaged in intimate behaviors, such as undressing, sexual activity, or other actions usually considered to be of a private nature. During anal sex, male pleasure can be particularly derived from the prostate, which can lead to an orgasm and ejaculation. Yuri : Featuring two grown adult women in a homosexual/lesbian hentai videos relationship. 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. In POV porn, the shooting style is generally similar to gonzo pornography, with the person receiving sexual gratification holding the camera him or herself—aiming it down at the actress or actor who is performing the sex act. Masturbation is the self-sexual stimulation of the genitals for sexual arousal or other sexual pleasure, usually to the point of orgasm.