My mum got me some books on periods and growing up and the like from the library when I was about that age, and since they were a little out of date I assumed I would have to get a belt and pad get-up like our mothers used to have to wear.
A childhood belief about periods

others believed things like this
- There were no writers behind children's books--they just magically appeared at the library! Anon
- I used to think babies where born naked because their mothers were too lazy to eat clothes for them to wearAnon
- I used to think that growing pains meant that a tomato plant was growing in your stomach.— Annette
- I used to believe that people had an expirey date.— Mason
- That if you didn't have your seat belt buckled up when the car was in motion, it would crash.— Dave Smith
- I used to believe that the Mormon Temple in Washington DC was Disney World. It sure does from the belt way.— William Scheren