It's a question we get asked fairly often, but it's not something we would ever arrange. I wrote a blog piece on the legality of nuru massage in London but it applies to all forms of massage where the lines might get a little blurry. Hope this is useful x
It was 2015 in Tulum, Mexico and there was a "spa" at the neighboring beachside hotel. They had two 15x15 tents, with three walls and open to the ocean, on a deck overlooking the 25yd deep beach. I wandered over and booked a massage for later that day. When I returned I was assigned a woman about 30-35yo I'd guess. Average looking, dressed in a professional white uniform for a spa. She was doing a great job, and after the flip started on my legs. When her hand went up my thigh my cock twitched. When she went up a second time I slowly got an erection. She was toward the end of the massage and went back to my thighs. I got hard again. She smiled, and her hand went under the towel and slowly started stroking me. She spoke a little English, saying, "OK? Twenty dollars?" I smiled and yes. I was so torqued up that I think I nutted after maybe ninety seconds.