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Prostitution is the business or practice of engaging in sexual relations in exchange for payment or some other benefit. Prostitution is sometimes described as commercial sex.
A person who works in this field is called a prostitute, and is a kind of sex worker. Prostitution is one of the branches of the sex industry. The legal status of prostitution varies from country to country, from being permissible but unregulated, to an enforced or unenforced crime or to a regulated profession. Prostitution is sometimes also referred to as "the world's oldest profession". Estimates place the annual revenue generated by prostitution worldwide to be over $100 billion. (Full article...)