Ah the need to pee. I've never taken acid but it happens on mushrooms. I constantly need to pee but never can. So annoying. I don't think I have the guts to take acid though, even mushrooms feel like they last for ages so 8-12 hours must feel like days.
I had no problem going to the bathroom on mushrooms. It was annoying on acid though. I think you would like it. But I had a small trip that consisted of my freinds arguing who would win in a fight super man or goku. With 2 opinions that obv were biased. Both of them went at it for hours. When I tripped on mushrooms I looked up and saw the trees waving only slightly with the leaves spinning It was relaxing. The acid trip did feel like days. I felt dead for a long time after the trip.
Peeing on shrooms is nothing compared to acid, it's like the muscle you usually use isn't there anymore.