Why does it happen?

What about the need to poop as you are driving home?

Omg i thought I was the only one

Or when you can't get your belt off when you're right in front of the toilet.

It's probably because your brain knows that you're very close to a toilet at that point.

It only ever intensifies for me when I'm in the bathroom ready to piss, and I'm wearing a belt. Suddenly the belt is 500% more impossible to remove.

Maybe because you're more relaxed when you approach your house?

Then u get in the house and u don't have to go anymore