A peep show or peepshow 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. In contemporary use, a peep show is a piecewise presentation of pornographic films or a live sex show which is viewed through a viewing slot, which shuts after the time paid for has expired. The viewing slots can be operated by a money box device, or paid for at a counter. Pornographic peep shows became popular in the 1970s as part of the developing pornography industry. Until home video became widespread, peep shows made up a major part of the way in which video pornography was accessed.