When sexual activity is centered on one of the threesome, then the activity may be described as a gang bang of the person. Since the 1980s, many practitioners and organizations have adopted the motto safe, sane and consensual, commonly abbreviated as SSC, which means that everything is based on safe activities, that all participants be of sufficiently sound/sane mind to consent, and that all participants do consent. The person sat upon may be in bondage, sexually submissive, or simply held down by the body-weight of the other person. Interracial pornography typically employs ethnic and racial stereotypes in its depiction of performers and many of interracial pornographic films still include racial stereotypes, although the segregation of actors by race has diminished considerably. A female dominant in a master/slave relationship is often termed a mature milfs Mistress, not to be confused with gay cock the colloquial usage of mistress as a kept sexual partner without a similarly formalized power relationship. The higher pay scale and profile within a production often leads to group scenes where a straight actor only tops. There may be more than two participants; both group sex and gang banging can be included. Women in homosexual relationships responded to this designation either by hiding their personal lives or accepting the label of outcast and creating a subculture and identity that developed in Europe and the United States. Related genres include: Amateur pornography originally referred only to pornography produced by amateurs but now also includes professionally made pornography designed to appear as if it were amateur. Targets the male audience, but is much less popular than Yaoi. The object or situation of interest is called the fetish; the person who has a fetish for that object/situation is a fetishist. Many men who like trans partners of any 3d hentai variety, known as tranny chasers, do not necessarily identify as gay themselves. Using the term shemale for a transsexual woman often implies that she is working in the sex trade.