I thought the term maiden name actually applied to women who were maidens.
I used to believe that people only grew upto age 10 as I hadn't been taught how to count beyond 10 at that age.
When I was a child I thought there was a person inside the ATM
My mother has a neurological condition where she has trouble concentrating on multiple things at once (not ADHD).
When I was a kid, I thought that this was an "adult" thing and that as I got older, I'd eventually lose my ability to concentrate on multiple things at once.
As I grew to be a teenager, I thought that I was the weird one and had some sort of mutation or other that allowed me to focus on more than one thing at a time.
It was only when I was about 16 that I learnt that having trouble focusing on multiple things at once was the exception, not the rule.
I used to think stage makeup was like ordinary makeup, and that people would do things like draw on themselves with lipstick to look like blood or use eyebrow or eyeliner pencils to give themselves spots. It does sound fun.
I thought "deployed" meant "fired".
When I was nine, I thought two eleven-year-olds could get married.
When I was eight or so, I was at the mall with my mother and got bored, so I looked through the greeting cards for something to do.
One of them had a message "you're not old until the fat lady sings" and when I opened it, it had an illustration of a large woman singing. I was worried that I'd then turn into an old woman.
I used to believe Sting was my dad in a parallel universe
When I was a kid I used think my father ever was right and other people was stupid.