When I was little and saw my aunt breast feeding I very bluntly walked up to her and stated that "this one is for millk and this one is apple juice." everyone was laughing so had they never told me any different.
A childhood belief about rude bits

others believed things like this
- I used to think that apple juice was beer and I'd drink it all the time and pretend to be drunk.— Dee
- as a young child i thought poo was brown from eating chocolate and pee was yellow from drinking apple juice!Anon
- My Mom used to tell me if I swallowed an apple seed I would grow an apple tree inside my stomach!— Marg
- I used to believe that an Adams apple was a piece of apple that was stuck in someone's throat.— Ron Aaron
- When I was a kid, I used to bellieve that when I eat an apple pip an apple tree would grow up in my stomach!Anon
- I thought the big apple was literally a giant apple in New York Anon