It turns out your mother was right when she told you to keep your finger out of your belly button. Apparently, pushing in there actually does do something - it makes you need to pee.
Dr. Christopher Hollingsworth of NYC Surgical Associates explained to The Mirror what happens when you push in your belly button.
He said that the sensory nerve fibers inside your stomach cavity interpret that pressure as a need to pee, and they relay that news to your brain, which then sends the message to your bladder, which will then have you heading to the bathroom.
So unless you're looking for a reason to leave a room, best to keep your fingers out of your belly button.
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