No person would sell sex unless they were desperate. To have sex with someone for reasons other than sexual attraction, desire, and affection is repulsive to any sane and mentally competent adult.  People who sell sex are not exercising sexual autonomy, but are giving up their right to sexual autonomy in order to support themselves and their families. Instead of legalizing sex markets, societies should provide other means of employment and a basic standard of living to all members, so that no one has to resort to prostitution to survive.