And, another thing. Even if it were to be legalized, there will always be criminals who will try to circumvent the rules. While I myself am a semi-libertarian, I do believe that once you start legalizing previously illegal (and unhealthy) activities, people will keep on pushing the boundaries, until there are almost no rules to speak of. At some point, legislation for the protection of public health needs to be passed to hold that tendency in check. At that point, it would be better to just clamp down on human trafficking, and keep prostitution illegal.