Bumping the threat so that hopefully it will inspire more to write about their most recent pee sightings.
I've had to and neither were "sightings" and both were quite a while ago.
One was when I was in the parking lot at a concert venue and saw a super hot girl disappear behind the dumpster in broad daylight and then return to her friends' car in the parking lot. I have no idea if she was peeing or not and I couldn't see anything, but when she came out from behind the dumpster she was fooling with her zipper and button of her jeans, so I'm only assuming. There were no cars parked near the back of the dumpster at the time. I regret not driving back there to try and catch her.
The other time was only slightly better because I got to hear a girl pee in the stall next to me at a different rock concert. (Not at the same venue.) I enjoyed that.