When I was 6 years old, I looked into the toilet and saw a little blood, which had lot been flushed down completely. I went to my mother and asked 'Mom, do you have your paradontosis?', somehow mixing up the word with "periods". Mom was perplexed.
A childhood belief about periods

others believed things like this
- I actually asked my mother if mixing girls' poop and boys' poop would cause an explosion.— kraine
- I used to believe that monsters lived in my toilet and they ate my poop and urine when i flushed the toilet.Anon
- I used to believe that if I flushed the toilet before I showered, I would take a shower in dirty toilet water.— Chris D
- I used to think if I left the toilet seat open my cat would get flushed down the toilet.— G
- I used to believe that the toilet would suck me down if I flushed it.— :-)
- i use to believe that if i flushed the toilet when i was still on it would suck me down to who knows whereAnon