Using the term shemale for a transsexual woman often implies that she is working in the sex trade. Insertion in pornography features women inserting various odd objects into their anus or vaginas. To tea bag is a slang term for the sexual act of a man placing his scrotum in the mouth of a willing sexual partner for pleasure or onto momporn the face or head of another person. Exhibitionist pornography features performers, gay sex video usually female exposing themselves in public and spans simple flashing to public sex. In pornography, depictions of lesbian sex form a popular subgenre, directed toward a male heterosexual and female homosexual audience. Some couples use a threesome as a way to develop a love triangle . Others may also use vibrators and other sexual devices more commonly associated with female masturbation. Rape itself is a crime in many countries. Others involve partners who naturally have a significant difference in size. Teacher and Student or Boss and Secretary pornography involves sexualized situations which take place between an authority figure, such as a teacher or boss, and an underling, such as a student or secretary, often fake. In the 1970s, the hardcore pornography genre introduced the stereotypical cumshot scene as a central element of the hardcore film, in which hentai sex the male actor ejaculates in a way ensuring maximum visibility of the act itself. This is commonly called double anal or double stuffing. Enema pornography involves adults given enemas to others, often fake. Sub-genres of Japanese porn Among the various sub-genres of Japanese pornography are the following: Lolicon ロリコン: This genre involves prepubescent and adolescent girls between the aged of 6-12. Especially popular in post-World War 2 Japanese culture. The surfacing of sex tapes has become so common that some are leaked as a marketing tool to advance or establish a media career. However, sex researchers and adolescent health care professionals have found no evidence for the existence of rainbow parties, and as such attribute the spread of the stories to a moral panic.