I took my seventeen year-old girlfriend to a small theme park in the countryside...It was quite a drive there and, understandably, soon after getting out the car she announced that she must have a wee.
I pointed out that the toilets were only a short distance away and we'd soon get there. However she said she couldn't wait, stopped still on the path, pulled up the front of her short skirt with one hand and yanked her knickers aside with the other, providing me with a lovely view of her young slit. She then produced a short but powerful jet of piss that made a noticeable puddle on the gravel.