The phrase "down the wrong pipe", ie, swallowing the wrong way, led me to believe that I had a whole range of pipes inside me, one for each of the different things I ate. So I would say, "Oh no, my peas went down the apple juice pipe!", etc. I used to wonder how they could all fit, I needed so many of them...
A childhood belief about eating

others believed things like this
- I used to think a drain pipe in my backyard led to another world.Anon
- I used to think that my dad was "smoking pot" when he would smoke his pipe while sitting on the toilet. 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 parents do things to make there children happier. well i was wrong. — Emma C.
- 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