I used to believe that if you drink a lot of water the bottom of your belly button will burst open and water will pour out of it. I Tried to do it but it did not work :)
A childhood belief about belly buttons

others believed things like this
- I thought tonic water was toxic water and wondered why would anyone drink it if it is toxic?— Dr.Badguy
- My mum used to tell me that you couldn't drink water out of the tap from the bathroom as it was poisonous.Anon
- When I was young I refused to drink well water because I thought it came out of whales.— itodd
- I used to think that if I ate a fruit seed it would grow in my stomach if I drink water after thatAnon
- if you drink water from unsafe places, frogs will grow in your stomach...— Olivier
- I used to believe that your belly button was what held your top half to your bottom half...— Debelouwho