The gov't should treat prostitution as a business arrangement, like buying food: there are regulations and health/safety standards, but otherwise the government doesn't tell you what to eat.
sodomy? Sodomy is a health risk. We are paying for Sodomy because we pay for AIDs, ect.
If the gov't is regulating prostitution, they will be getting money from it. Once they start getting money from something, they start promoting it. they are in that business.