The term BDSM dates back to 1969; however, the origin of the gay sex video term BDSM is unclear and is believed to have been formed either from joining the term B&D with S&M , or as a compound initialism from B&D, D&S , and S&M. Sexual orientation Pornography features an increasing variety of combinations of actors by their sexual orientation such as lesbian, gay, bisexual, and transsexuals in addition to traditional heterosexual roles. Common phrases used to refer to these individuals are chicks with dicks or the derogatory term shemale, although these are generally considered pejorative among transwomen. Internal ejaculation shots are a comparatively recent development in pornography; they are not found in early pornographic films. Specific sex acts Anal Anal pornography features anal penetration with a penis, dildo, other objects, or some combination of them. The term pearl necklace is used by some because the drops of semen deposited by the man resemble a necklace of translucent white pearls. Bukkake is a sex act portrayed in pornographic films, in which several men ejaculate on a woman, or another man. Sadism describes sexual pleasure derived by inflicting pain, degradation, humiliation on another person or causing another person to suffer. When the interest in a particular subject is obsessive, the behavior may be described as stalking. Typically featured are hitting, choking, name-calling and hair-pulling. Once insertion milf fuck is complete, the fingers are either clenched into a fist or kept straight. Yaoi is anime or manga that features gay males . However, various groups within society considered such depictions immoral, labelling them pornographic, and attempting to have them suppressed under obscenity laws, with varying degrees of success. The actual height of the giantess 3d hentai within the fantasy may vary depending on the individual. Additionally, the buttocks give an indication of the shape and size of the pelvis, which impacts reproductive capability. Patricia Hill Collins, an African-American writer, theorizes that this is derived from a stereotype that those of black descent are promiscuous, and their buttocks are objectified by porn as a result.