The first time I asked my mother what a period was she said it was when a girl pees blood. Because I hadn't yet started having periods I was worried that my pee was pee instead of blood!
A childhood belief about periods

others believed things like this
- HA! I used to think when you got your period, you would just pee blood...I wish it was like that...if only.Anon
- when I was young, I heard that blood had iron in it. I thought blood was red because it was rusty.— Hunter
- I used to believe period blood came from the nipples. I thought that was what "padded bras" were for!!Anon
- I used to believe that when I started menstruating, I would bleed to death from losing too much blood.— Debbie
- I used to believe that guns shot out blood because everytime somebody shot a gun in a movie you saw blood.Anon
- I used to believe that salt would dry up all of my blood because my mother told me so.— Charlotte H