I didn't understand what a microphone was, and thought the mics and brown microphone covers used by performers on Top of the Pops during the late 1980s were actually gigantic bulbs of chocolate, put there in case the singers became hungry. But I'm alright now...
A childhood belief about technology

others believed things like this
- Chocolate, they say, rots your teeth. I believed if you drank chocolate milk, your bones would be brown.— Dellio
- I used to belive chocolate milk came from brown or chocolate cows.Anon
- Thought chocolate milk came from brown cows.— Patti
- I thought chocolate milk came from brown cows.— E
- 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 what ever was brown tasted like chocolate— LEADY