Although there may be no connection between coprophilia and sadomasochism , the limited data on the former comes from studies of the latter. Pornographic films are typically categorized as either softcore or hardcore pornography. Pornography is often distinguished from erotica, which consists of the portrayal of sexuality with high-art aspirations, focusing also on feelings and emotions, while pornography involves the depiction of acts in a sensational manner, with the entire focus on the physical act, so as to arouse quick intense reactions. Portrayals of lesbians in the media suggest that society at large has been simultaneously intrigued and threatened by women who challenge feminine gender roles, and fascinated and appalled with women who are romantically involved with other women. Diaper fetishism is totally independent from pedophilia as the wearer derives pleasure only from the diaper and/or use of it. In S/M, the Sadist is usually the Top and the Masochist the Bottom, but these roles are frequently more complicated or jumbled . Women oriented pornography is sometimes referred to as sex positive pornography. It is also known colloquially as gushing or squirting, although these are considered to be different phenomena in some research publications. Films with risqué content commenced to be produced soon after the invention of the motion picture in the videos porno gay 1880s. If one person is penetrated by two objects, it nude milfs is generically hentai movies called double penetration . Foot fetishism has been defined as a pronounced sexual interest in the feet or footwear. A homosexual threesome would involve either three men or three women. The term combines elements of the Freudian psychoanalytic fetish and the Marxist commodity fetish, and is used in the context of British, Spanish and French colonialism and imperialism and their aftereffects. The act may be carried out face to face, or head to tail, with the woman recommended to be on top if she has smaller breasts. Interactive pornography, available in CD-ROM and DVD format, allows the viewer to select the particular acts performed at any one time, sometimes with the camera providing a first person view.