system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5 Why is it that running water and showers etc. makes you need to pee even when there was no urge beforehand.
gpt
I wonder if it happens to people whose parents used the faucet to help with potty training, thereby ingraining it into their physiology?

It doesn't seem to be an issue across the board, as some people don't have that instinct.