I've have it done to me in D/s play, though it has been a few years. It was a "kneeling in the shower" type of thing, no swallowing. My husband even took pictures of me pee'ing, which are safely hidden!

:redface:
I can't say that the act itself turns me on, nor do I fantasize about it, but if I were in a relationship with a man who wanted it, I would do it for him, and that
he liked it would be exciting. I've never pee'd on a guy, nor have I ever wanted to. Again, if he was excited by the act, however, I would do it to him. I'm pretty open to exploration and don't judge, though I have some very definite limits.
I do love to hold a man while he pees, then shake it for him! :biggrin1: