Asked my favorite masseur (who charges below market rates for his massages) about tipping and how he views it:
"Tipping is not required but definitely appreciated, I see it as a thank you for a job well done. I do keep track of who tips and how much. It enters into play only when responding to multiple requests for a specific time, yes the guy who tips will get first chance at a spot. I only get miffed about a non tipper when they have abused my time or gotten a lot more than they paid for. If a client is more than 5 minutes early or 5 minutes late, they should tip. If they use my shower before and/or after a massage they should tip. If it took more than three texts/emails to book an appointment, they should probably tip. I do not charge extra for sensual services like some masseurs so if a client gets anything beyond a legit massage, a tip would be nice, specifically anything more than Hand Job. For instance, if they want me naked, I will not charge for that but am surprised when I don't get a tip for that. Same with Prostate massage, I don't charge more, but would be surprised if I did not get a tip. So let's say a client wants it all, mutual touch, me naked, prostate massage, maybe suck my dick, take a shower.... and they don't tip? They would drop to the bottom of my list for getting back on my table. Not saying it wouldn't happen. If they are a nice person, friendly, etc. they will be fine. If they got everything, didn't tip and were in anyway rude or inconsiderate of my time - then no, I would not let them book again. As far as how much to tip? Well, depends on how much the client received and how difficult they were, sort of a cumulative thing I guess. Hope that helps!"