I agree in that it’s the thrill of the unknown, and the dance between me and the masseur, figuring if they’re game. Ive had luck with masseurs where the text exchange had nothing about going further at all, but the massage itself did go further. I usually respond to their initiative; them putting their clothed crotch in my hand, or brushing their bulge on my head. Or if they brush their hand in certain areas, I’ll let out a moan to show that it felt good.
Those are my most memorable masseurs, the ones I go back to. I usually don’t go back to any that present a menu of options. I like the organicness of letting the massage session unfold.