From today's paper comes this article about Sunflower Massage, not too far from the tourist corridor and being investigated for prostitution:

". . . Crime scene analyst Tracy Kruse . . . inspected Sunflower Massage. . . . She used special lights that illuminate chemicals and biological fluids, and 'the rooms glowed a lot,' Kruse said. Subsequent tests indicated that the glowing globs were semen."

I have never been to a Las Vegas massage parlor. And if you go I would recommend dressing like it is winter in Minnesota. Touch nothing. And really ask yourself if this is where you want to be during your Vegas visit.