The sex industry (also called the sex trade) consists of businesses which either directly or indirectly provide sex-related products and services or adult entertainment. The sex industry provides sex-related products and services such as prostitution, call girls, adult movie theaters, pornography, sex shops, strip clubs, sex-oriented men's magazines, sex movies, sex channels for television and pre-paid sex movies for on demand. BDSM can also play a part in pornography and prostitution.