Kinbaku means tight binding Kinbaku-bi which literally means the beauty of hentai videos tight binding. The Silent Duck, also called Duck-Billing, is the technique often used in which the person engaging in hand insertion shapes the hand to resemble a duck beak. Incest pornography can feature actual relatives, but the main type of this pornography simply uses actors of similar looks to suggest family relationship. Terminology for roles varies widely within the various BDSM subcultures. Transgender pornography features performers who cross-dress for sexual gratification, either for themselves or for their partners. This momsex industry employs thousands of performers along with support and production staff. Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an orgasm. Depictions of male and female masturbation are common in pornography, including gay pornography. Usually that person prefers to stage the wetting so that his/her legs become soaked with urine. Internal ejaculations, followed by images of semen dripping from the anus, are sometimes depicted in bareback gay pornography, where they are referred to by the term breeding or the reverse money shot. For circumcised males, on whom the glans is mostly or completely uncovered, this technique creates more direct contact between the hand and the glans. Lucky Pierre is slang for a person performing both receptive gay movies and insertive anal and/or vaginal sex simultaneously during a threesome, being positioned between the two partners. Sadomasochism is practiced in isolation relatively rarely, though some masochists report biting, pinching, or even stun-gunning themselves as a prelude to, or as part of, masturbation. Some techniques which may work for one individual can be difficult or uncomfortable for another. The term soft crush refers to the more common fetish surrounding videos involving inanimate objects or small invertebrates being crushed, while the term hard crush refers to such videos involving larger animals with vertabrae, and arguably more pain-susceptible animals .