Diaper fetishism, nappy fetishism or diaperism, is a sexual fetish in which a person feels a desire to wear or use diapers. Some aspects of the research community distinguish between female ejaculation and what is colloquially known as squirting or gushing. Participants who exert sexual control over their partners are known as dominants or tops while participants who take the passive, receiving, or obedient role are known as submissives or bottoms. Two women tapegagged and cuffed to iron bars Bondage and Discipline are two aspects of BDSM that do not seem to relate to each other because of the type of activities involved, but they have conceptual similarities, and that is why they appear jointly. Solo pornography recognized with AVN Awards include the All Alone series and All Natural: Glamour Solos. For example, in Australia it is rated Refused Classification . This industry employs thousands of performers along with support and production staff. It is sometimes combined with BDSM features. Jerk off instruction features a performer gaysex encouraging or instructing the viewer to masturbate, often culminating in a countdown at the end of which the viewer is invited to induce orgasm. Spanking can be administered in a number of spanking positions. For instance, Amateur Allure has a trademark shot where the sexually performing lesbian hentai cameraman circles a handycam around the sexually performing model head. For much of the history of cinema and television, lesbianism was considered taboo, though since the 1960s it has increasingly become a genre in its own right. Voyeur pornography may also include shots of topless women on topless porn milf beaches who are unaware of the cameras but may legally be photographed due to the public setting. The phrase buttered bun is sometimes used to refer to the owner of the orifice in question. In academic discourse, racial fetishism is a postcolonialist term found in the writings of authors such as Homi K. 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.