IMO, all employment is a form of prostitution. Even though a job doesn't entail the employee using their genitals in a sexual way, they still use their entire body for a given length of time.
And like any other job, it is the legal obligation of the employer to see that safety is ensured for the employee. In the case of prostitution, condoms and safe sex practices are vitally important.
Since this question is in the religious section, it should be noted that the very first religious temples also served as brothels, and prostitutes were considered priestesses. The division came with the patriarchal dominance, and the shift in focus from tribe to family.
BTW, jl - Prostitution IS illegal in Las Vegas, which is in Clark County, Nevada. Only countys in Nevada with populations under 400,000 have legal prostitution.