Hydration is Good
Staying hydrated is a good thing, as Sosha explains in this video, but it does make one need to pee.
After drinking lots of water, we find Sosha desperately needing to pee. Talking directly to the camera, they tell us that they are going to pee in their pants for us to watch. After Sosha soaks their jeans, they show off their wet pants to the camera.