system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why does the urge of going to the bathroom drastically increase the closer you get to the bathroom?
gpt
It's a trained psychological response.

We have trained ourselves that the toilet is a safe place to let loose. 

It's the same reason people will fall asleep if they lay down on a bed, even if they are not tired.