I have had tantra massages performed, but usually at my home or at the masseuses home. Most of the time they generally avoid the genitals until last in my experiences. You may need a doctor to check you out, as you might suffer from phimosis. A tight foreskin is a problem, a painful one. Also, most tantra masseuses have dealt with worse assholes than a hairy one. Just wash it clean, and you are golden. I would suggest you masturbate before going to see one, as it might help loosen the foreskin for the masseuse to work with. As I was clipped, I cannot relate to it, but I know of people who have phimosis. It is not your fault, its just a fact of nature sometimes. But just be relaxed and let the masseuse direct things, as your enjoyment will increase if you go with the flow, so to speak.