I used to believe that when my mum replied 'I wouldn't if I were you' she was actually threatening to 'fiver' me, which sounded pretty scary, so I never did the things I was asking her opinion on!
A childhood belief about speaking

others believed things like this
- My 7 year old nephew holds the opinion that the correct name for a pidgeon is a "city chicken".— Bastard
- i used to think that when i turned 5 i would become a boy because 5 sounded like a boy age.Anon
- I used to think Monserrat sounded like monster rat.Anon
- I used to think that prostitutes were female lawyers. It just sounded so official...— MC
- I used to call the rays of light from the sun "sun BEANS". That's what it sounded like to me.Anon
- I used to believe that India and Indonesia were right next to each other since their names sounded alikeAnon