I gotta agree with London. It will just add a layer of bureaucracy into the whole industry. Currently, it is working 100% smoothly, for what I can at least expect, and there seems to be nothing that needs correction (or needs to be gained by being legalized).
You can hire a math tutor who cannot resist your lure and ends up giving you a bj during the session. The tutor does NOT need a separate legislature just to point out what "further" rights he/she has. Hell we just need to repeal laws that illegalize prostitution and no need to legalize it.