When it comes down to it, is there any real, valid reason prostitution is illegal? All right, it can be questionable morally, but how is it a threat to society? In fact, making it legal makes it less of a threat, because then it can be treated as a legitimate business, with health care and insurance, and steady wages. The women would have more protection from abusive johns and pimps, and men would have greater assurances of not getting robbed. The ability to tax it is just an added bonus.