Tried it a couple of times. First time was just out of curiosity and it didn't do much for me or the guy I was with. Preferred a shower actually, also wet and warm. Second time was with another guy who I knew really well. We were incredibly horny at that time and he asked me to pee on him. Took quite some effort because I was so hard at the time but I managed and it turned into us swapping places all the time, pissing over each others faces, in our mouths and asses. It was incredibly arousing suddenly. We never repeated it that way but a couple of times after that one session, when he was eiding my cock he exclaimed he had to pee and I encouraged him to let go. Really great view actually when someone is on top of you.