I used to think that "Heath" chocolate toffee bars were actually "Health" bars. i didn't actually try one until i was about 16 and realized that they weren't healthy in the least bit!
A childhood belief about sweeties

others believed things like this
- I used to believe women were not allowed eat yorkie bars
— greg - I thought you could get toffee from mixing tea and coffee.Anon
- that when I growed up I would be a footballer but that was obviously rubbish as I can't play for toffee— Darren
- Chocolate, they say, rots your teeth. I believed if you drank chocolate milk, your bones would be brown.— Dellio
- That donuts where healthy!!!— Stephanie!!
- I used to belive chocolate milk came from brown or chocolate cows.Anon