I used to be afraid of getting my period because I believed that my [private parts] would suddenly tear apart which would cause agonising pain and a lot of blood to come out.
A childhood belief about periods

others believed things like this
- When I was a child, I used to believe that armpits were private parts— Duda Gueiros
- 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 period blood came from the nipples. I thought that was what "padded bras" were for!!Anon
- When I was little I believed that boogers were parts of my brain that got used up.Anon
- when I was young, I heard that blood had iron in it. I thought blood was red because it was rusty.— Hunter
- I believed that all of my blood was stored in the calves of my legs. — Julia