I used to get red bathwater confused with menstrual blood like if a woman or teenage girl was using red bath foam or shower gel and it looked she was washing all the blood away.
A childhood belief about periods

others believed things like this
- 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 that guns shot out blood because everytime somebody shot a gun in a movie you saw blood.Anon
- I believe that it would rain when God would be having a shower or washing his clothes.— Karina
- when i was litte
I used to believe that white people had white blood and black people had black blood.Anon - I used to believe that milk was cow blood. — Stephen
- HA! I used to think when you got your period, you would just pee blood...I wish it was like that...if only.Anon