When I was little I used to insist that pirates' parrots didn't say "pieces of eight", they said "pieces of egg". It made a lot more sense to me, because you can't chop an eight up (OK, I didn't know an eight was an old coin) but eggs are easily sliceable.
A childhood belief about birds

others believed things like this
- I used to believe that comets were pieces of the Sun that had broken off.— Carmen
- I used to believe that if I ate pieces of bread it would soak up my pee and I wouldn't have to pee anymore.— Anna
- I used to belive that however many pieces of cake you had determined how old you were turning!Anon
- I used to think the reflectors in the middle of roads were pieces of cheese!Anon
- I used to think when you smelled a fart, that you were breathing in tiny pieces of poop.— brandypandy
- I used to think that serial killers chopped their victims up into little pieces and eat them with their cerealAnon