I was afraid as well, but one dream I forgot about the fact that I could do that in the outside world and I did it anyways. I didn't have to pee when I woke up and I freaked out. I didn't find anything wet, and a few minutes later the urge to per came back. Since I use water as a back up to intent for natural awakenings, I do it a lot now. just pee where I am at or just pull it out and pee while flying (not gonna lie... Pretty fun).