I saw that boxes of tampons often showed up in our bathroom. I asked her what they were, and she explained that they were for when you got your period and they would soak up the blood. I assumed that periods meant you were peeing out blood, and tampons were a kind of specialized toilet paper that could stop this.
A childhood belief about periods

others believed things like this
- I used to think that tampons were meant to absorb women's urine so they wouldn't have to go to the bathroom.— Koyaanisqatsi
- 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 guns shot out blood because everytime somebody shot a gun in a movie you saw blood.Anon
- that u unrolled tampons and placed them in ur underwaer— DKuser