I used to belive that Green Bay Flies common in the Upper Peninsula of Michigan when I was a boy would potentially fly up your nose and build a nest in your brain. At certain times of the year there were hoards of them and they were about the size of a small grasshopper. It seemed like I was forever holding my nose shut . . . just in case.
A childhood belief about creepy crawlies

others believed things like this
- I used to think bogies were made of dead flies which had flown up my nose.— Kate
- i used to believe that if you picked
your nose your brain would cave in...— mr bogtrotter - when i was little my mum used to tell me if i picked my nose too much my brain would fall out!!! think it did— Maz
- my mom told not to pick my nose because if i fell i would poke my brain.— brent
- i was always told if i picked my nose my brain would fall out! i belived it for years!Anon
- my brother (10) still believes that if you stick your finger to far up your nose you can touch your brainAnon