Some of my favorite repeat massage therapists began as strictly therapeutic and are now sensual and even erotic.
I always ask for no draping and I'm completely naked, or if they drape me, I somehow manage to kick it off or tell them I'm too hot or something.
One guy I saw regularly for two years and then suddenly one day, he flipped me over and began massaging my genitals. He also took off his shirt for the first time ever!
Another guy who is straight and married started getting sensual with me on my first visit, and now he strips completely naked halfway through as we enjoy MT and HE.
Yet another, who left an upscale spa chain and started his own in-home practice, began as VERY therapeutic and has graduated to rimming and fellating me on every visit.
And finally is the cute little Mexican dude who gave me a half dozen of the best therapeutic massages ever and has graduated to that PLUS some of the most erotic.
For about the past year, I've been going to a certain Asian fellow at a spa. He gets a bit more sensual with every visit, now completely exposing my ass and massaging into the crevasses, then flips me over and drapes my torso while he massages my feet and legs, leaving my genitals exposed and gently grazing them. He can easily see my erection and precum. No overt touching, though--not yet!
I think it's about establishing trust and discovering chemistry.