Cum-shot pornography features a collection of male ejaculation scenes. It generally contains nudity or partial nudity in sexually suggestive situations. It can be combined with fellatio and the woman may move her breasts up and down on the penis for an additional stimulation, usually before the man reaches orgasm. Making a pearl necklace is one of the activities that sex workers use as safe sex alternatives for people who refuse to wear condoms. Exhibitionist pornography features performers, usually female exposing themselves in public and spans simple flashing to public sex. Actors are mostly amateur; any well-known actors in bisexual porn tend to be from the gay pornography industry. This is porn milf commonly called double anal or double stuffing. In a separate article analyzing 12 men who engaged hentai movies in bestiality, an additional analysis of an 11-man subgroup revealed that 6 had engaged in coprophilic behavior, compared with only 1 in the matched control group consisting of 12 SM-oriented males who did not engage in bestiality. In many cases, that person is also aroused by smelling body parts that have a urine scent. It has been described as professionally made porn which seeks to emulate the style of amateur pornography. In these cases, the appearance of an enlarged abdomen caused by obesity or overeating may be sufficient, or simply the suggestion of a protruding navel. Spanking or whipping pornography involves spanking or whipping, generally of the buttocks, with the hand or with other objects such as belts, switches, paddles, brushes, or whips. Asian fetish is a slang term which usually refers to an interest, strong attraction or preference for people, culture, gay twinks or things of Asian origin by those of non-Asian descent. A sub-set of gaping is the “‘tunnel cumshot”, wherein the male ejaculates directly into the gaping anus. Well-known female porn stars who expressed their pleasure in pegging their male partners include Taylor Wane, Debi Diamond, Brittany Andrews, and Monique Covét.