A guy did massage out of an office in downtown Detroit. Unusual in that he started with you on your back, massaging your chest, then flipped you over. The first time I went to him, after I'd flipped over, he started rubbing his hardon (still in shorts) against my hand, and it progressed from there. I honestly don't remember giving him any signals, but being me, I ran with it :-) subsequent visits were purely therapeutic. The last time I saw him, it was in a different space, purely therapeutic, but he kept squeezing on my achilles tendon, which hurt; I asked him to stop doing that, he didn't, and I've never seen him again.