A peep show, peepshow, or, a peep booth is a presentation of a live sex show or pornographic film which is viewed through a viewing slot.
Several historical media provided voyeuristic entertainment through hidden erotic imagery. Before the development of the cinema in 1895, motion pictures were presented in peep boxes, such as the kinetoscope and the mutoscope. These remained relatively popular for erotic and pornographic films, such as What the Butler Saw.
The sex industry, also called the sex trade, consists of businesses that either directly or indirectly provide sex-related products and services or adult entertainment. The industry includes activities involving direct provision of sex-related services, such as prostitution, strip clubs, host and hostess clubs, and sex-related pastimes, such as pornography, sex-oriented men's magazines, women's magazines, sex movies, sex toys, and fetish or BDSM paraphernalia. Sex channels for television and pre-paid sex movies for video on demand, are part of the sex industry, as are adult movie theaters, sex shops, peep shows, and strip clubs. The sex industry employs millions of people worldwide, mainly women. These range from the sex worker, also called adult service provider (ASP), who provides sexual services, to a multitude of support personnel.