From as far back as I can remember, I had always (up until I was 7 or 8 and in school) believed that urine was just the extra apple juice your body had not wanted. I also believed that saliva was apple juice that was stuck forever in your mouth.
A childhood belief about weeing and pooing

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
- I used to believe that an Adams apple was a piece of apple that was stuck in someone's throat.— Ron Aaron
- My Mom used to tell me if I swallowed an apple seed I would grow an apple tree inside my stomach!— Marg
- 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