There was this girl who thought her mum became pregnant by drinking water and that we shouldn't drink any ourselves.
(she was only 5 then!! bless her!)
A childhood belief about getting pregnant

others believed things like this
- I always thought there was a drinking age for coffee, because it was an adult drink like beer and wine.Anon
- I thought tonic water was toxic water and wondered why would anyone drink it if it is toxic?— Dr.Badguy
- I used to believe that you got pregnant by drinking the man's wee wee!! Yeuck! I was never having a baby!!— A
- When I was young I refused to drink well water because I thought it came out of whales.— itodd
- My mum used to tell me that you couldn't drink water out of the tap from the bathroom as it was poisonous.Anon
- I used to think that if I ate a fruit seed it would grow in my stomach if I drink water after thatAnon