Some BDSM practitioners prefer a code of behavior that differs from SSC and is described as risk aware consensual kink , indicating a preference for a style in which the individual responsibility of the involved parties is emphasized more strongly, with each participant being responsible for his or her own well-being. Female dominance refers to BDSM relationships and BDSM scenes in which the dominant partner is female. The wife who enjoys cuckolding her husband is frequently called a hotwife, or a cuckoldress if the man is more submissive. It is used, for example, at fertility clinics to stimulate sperm donors. Its primary goal is sexual arousal in its audience. In general, BDSM play is usually structured such that it is possible for the consenting partner to withdraw his or her consent during a scene; for example, by using a safeword that was agreed on in advance. The reverse of this, in which anime hentai nude women interact with clothed men, is called Clothed male, naked female . Some techniques which may work for one individual can be difficult or uncomfortable for another. A variant of A2M horny milfs is ATOM where a performer inserts his penis directly from one recipient anus into a second recipient mouth. A variation on this is to place the fingers and thumb on the penis as if playing a flute, and then videos gays shuttle them back and forth. It is also known colloquially as gushing or squirting, although these are considered to be different phenomena in some research publications. Female ejaculation is the expulsion of fluid by the paraurethral ducts through and around the human female urethra during or before an orgasm. For legal reasons, the vast majority of so-called reality porn involves professional actors and actresses posing as so-called amateurs. Omorashi: The act of holding one own urine until the need to urinate is urgent, making another hold in their urine, or watching another person with an urgent need to urinate. Hentai is the various forms of Japanese pornography, including H-manga, H-anime, and H-computer games.