Depends on the spot. i was listening to a podcast describing it and they banned them in Thailand so now they kind of give you a hand job using their wrists or something. Traditionally, the hand job was a method of just having the ultimate in relaxation, nothing overtly sexual, but when you get one you're probably at your most relaxed. Just part of the service.
Those places were all over, just not my thing. THEY DONT HAVE ANY DUDES GIVING MASSAGES! Just kidding, they do!, just kidding..... Truth is I'm too afraid of my dick turning jaundice and exploding.