Andrews cross or spreader bars. Scat or brown pornography features defecation, manipulation of feces, or consumption of feces, in reality or fantasy; a well-known example is the 2 Girls 1 Cup video. See also Gay-for-pay. Penetration may involve use of fingers, toes, sex toys, or penises. Lolita gay sex video pornography that features actual teenage girls under the age of 18 is illegal in most countries and treated as child or youth pornography. Medical pornography involves sexualized medical, often fake, including gynecological pelvic examinations, rectal examinations, and pelvic or gynecological ultrasounds. Men who perform in mainstream gay pornography often do not consider themselves gay or bisexual. In the West, masturbation in private or with a partner is generally considered a normal and healthy part of sexual enjoyment. While wearing diapers, a diaper fetishist generally experiences a comforting feeling. Bra pornography involves hentai sex women or men dressed in bras. Such documents have not been recognized as being legally binding, nor are they intended to be. These include gently sucking and tugging on the scrotum and use of lips to ensure minimal contact with their teeth. In general, as compared to conventional relationships, BDSM participants go to great lengths momporn to negotiate the important aspects of their relationships in advance, and to take great care in learning about and following safe practices. Anilingus is an oral and anal sex act where one person stimulates the anus of another person by the use of their mouth, including lips, tongue or teeth. The initialism BDSM includes psychological and physiological facets: Bondage & Discipline Dominance & Submission Sadism & Masochism Types of Play This model for differentiating among these three aspects of BDSM is increasingly used in literature today. Some people get sexual pleasure by inserting objects, such as urethral sounds, into the urethra , a practice known as urethral play or sounding. Women who adopt a lesbian identity share experiences that form an outlook similar to an ethnic identity: as homosexuals, they are unified by the heterosexist discrimination and potential rejection they face from their families, friends, and others as a result of homophobia.