Such grounds and even the definition of pornography have differed in various historical, cultural, and national contexts. Gay pornography is the representation of sexual activity between males. Instead, all five fingers are kept straight and held as close together as possible , then slowly inserted into a well lubricated vagina or rectum. In Japan, point of view pornography is referred to as hamedori . Lying face down one may use the hands, one may straddle a pillow, the corner or edge of the milf xxx bed, a partner leg or some scrunched-up clothing and hump the vulva and clitoris against it. Sadomasochistic scenes sometimes reach a level that appear more extreme or cruel than other forms of BDSM—for example, when a masochist is brought to tears or is severely bruised—and is occasionally unwelcome at BDSM events or parties. Arcane or occult pornography involves sexualized situations with an occult or magical tone or performers who costume themselves in keeping with the gay twink porn theme, for example, a male performer dressed as a wizard. As well as traditional attraction, the topic also incorporates feederism and gaining, where sexual gratification is obtained via the process of gaining body fat. Others consider the position to involve the man squatting over his reclined partner while the testicles are repeatedly raised and lowered into the mouth. This genre also features male-on-male fellatio through a small hole made in a bathroom divider. Coprophilia , also called scatophilia or scat , is the paraphilia involving sexual arousal and pleasure from feces. Rimjob pornography centers around 3d hentai anilingus. Contrary to the other two types, B/D does not define the Tops and Bottoms itself, and is used to describe the general activities with either partner being the receiver and the giver. Most bisexual porn is made by small production companies rather than the major studios. As women, they face concerns separate from men. Many transgender people regard the term shemale as offensive, arguing that it mocks or shows a lack of respect towards the gender identity and gender expression of transgender individuals; in this view, the term emphasizes the biological sex of a person and neglects their gender.