A friend of mine got her period in 3rd grade (rather an early bloomer don't you think) and most of us didn't know what it was yet. So she found and came running running into the classroom screaming "Help! Help! I'm peeing blood!" I was one of the few who did and you can imagine I had quite a laugh about it. And of course, we still tease her about...
A childhood belief about periods

others believed things like this
- I used to think running for president involved actually running somewhere.— Artimage
- HA! I used to think when you got your period, you would just pee blood...I wish it was like that...if only.Anon
- I used to believe that you could get cancer from looking in the microwave while it was running.— Kayla
- I used to believe that cats eyes were lit up by a man running under the road with a torch— Martin
- At about age 7 I thought one could see the people running around on a map, if one looked hard enough.— Adam Smith
- I used to believe that I could fly like Superman if I had the right cape and got a good running start. — Rick