system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5:What causes 'stage fright' AKA the inability to pee when standing next to someone else at the urinal?
gpt
This is known medically as paruresis. Basically, micturition (peeing) is mediated by the parasympathetic nervous system. When you are nervous, your sympathetic (fight or flight) system takes over and inhibits parasympathetic functions, thus making it hard to pee.