As a little girl, I thought only SOME girls would get their period. So, naturally, I thought it would never happen to me... Then came my huge surprise at nine years old, went I noticed blood in my panties... I ran out of the bathroom crying and screaming for my mom, I couldn't believe it had actually happened to me. I still cried for the next few months before I finally understood and realized that ALL girls had periods, and not just a few unlucky ones...
A childhood belief about periods

others believed things like this
- When my mom was a child, she thought that while girls had periods, boys had hemorrhoids!Anon
- I thought that the difference between girls and boys was that girls have teeth.
Anon - I used to believe that all girls one day just became pregnant. Like at some magical age it just happened.— niki
- I used to believe all babies came out as girls and later on in life some of those girls turned into boys — Tom
- I used to think it was true that only ugly girls poop and I thought I was an ugly girl because I poopedAnon
- I used to believe period blood came from the nipples. I thought that was what "padded bras" were for!!Anon