I would just say that there is a distinction here between the original poster, who has been a client of this masseur for 4 years, and what you describe, which sounds like a one and done situation. At this point, if the poster’s provider was going to engage in some sort of blackmail or extortion, I dare say he would have done it already. Though I agree with your approach on an early visit. If it’s not what I expect or desire, I simply won’t return.