When I was a child, I once saw a commercial for Nutra-Sweet while I was visiting my grandma. The commercial showed bananas and milk, so I believed that if you ate bananas chopped up in a bowl of milk it would turn into sugar. I remember eating this concoction several times but alas it never turned into sugar.
A childhood belief about adverts

others believed things like this
- My mum told me that if I ate sugar from the sugar bowl I'd get worms.— QueenB
- i get bit by so many moskitos because i'm a sweet child with sugar in my vains.— Ella
- I thought that a "sugar daddy" was a father who let his kids eat all the sugar they wanted.Anon
- adding too much sugar to foods would give you "sugar worms"...
Anon - I used to believe that when cordial drink said 'sugar free' that you didnt have to pay for the sugar in it!— Grace Lyon New Addington
- Until recently I thought you could only get diabetes from eating too much sugar not just from being overweight— Tooken