Only on dive 15, but never peed in any wetsuit. I drink 16 ounces of water before each dive too. On my checkout dives the topic came up, I said I wasn't going to pee, everyone laughed and said I would. I drank 32 oz of water, that day, told everyone I would wait till my suit was off. Then I forgot to pee until after we went to lunch and I had 4 beers. I started to notice it at that point lol. I am not saying I wouldn't do it if I was unconfortable, but I just have never felt the need. I think I sweat alot, which is the same thing. Now I just need to figure out why my boots smell so damned bad.