I seem to recall being told by a doctor that snot was made out of waste materials like dead brain cells. As I used to sneeze A LOT, I thought this was making me thicker.
A childhood belief about general

others believed things like this
- When I first saw a picture of the human anatomy, I thought the brain was really snot.Anon
- When I was little, I used to believe that snot was brain juice.Anon
- My brother used to tell me if I picked my nose I would become more stupid because bogey were brain cellsAnon
- I was once told by a friend at school that if you sneeze you actually die for a split second.— Alex
- My dad always told me to never hold my sneeze and if I did, then my head will explode.— anon.
- I was told in first grade that if you fart burp and sneeze at the same time you would blow up— bob doodle