I remember when I was a child being told that humans "ONLY" have 10 pints of blood in their bodies. Because of that, I always feared dying from bleeding too much, as if our bodies didn't eventually replace our missing blood as we ate and drank food. I feared that after a while (say 10 years), if enough blood drained from me from all the times I got a scrap, that I would reach a point where I just didn't have enough blood to live, and would immediately die.
A childhood belief about general

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
- We were always told that if we drank vinegar our blood would dry up— Mike B. London
- 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 if you drank vinegar that your blood would dry up.— Emily Hughes
- My father used to call soya sauce "monkey blood". I didn't even consider tasting it for years!— Me
- I was told when I was little that eating too much salt on your food would "dry up your blood".Anon