I don't recommend it. If they are a proper and licensed RMT, you'll get nothing except blue balls!
I had a really attractive chinese RMT for ONE session. When I did the flip, I was pitching a tent that could be seen by Mr Magoo! She didn't say anything, but even when I was done and was wearing my trackpants, she could see my boner sticking straight out. She told me not to let anyone see "that" (pointing at my cock) and after that she "no longer works at this clinic", was the response I received when trying to rebook.
Another one was so hot, that when she was doing my gluts, I splooged a voluminous load. She didn't say anything at the time, but when I was leaving and (very shyly) gave her a tip, she politely said, "I'm not here for that". I was too embarrassed to return.
Maybe that's why the hot chicks don't study to be an RMT.
Now I have a GREAT RMT, who actually gives me a great HJ whenever I request (or have an erection) and is happy with the $20 tip I give (but before I receive more requests for her info, she works at a clinic Exclusively for MVAs, and asked me not to tell anyone) so I'm just looking for an attractive MPA who will get naked and give a great BJ.