I used to believe that bad guys could come up through the toilet. This came from speculation by my neighbor friend. Until I was about seven I would flush the toilet and then run out of the bathroom as fast as I could because flushing let them know you were there!
A childhood belief about bathrooms

others believed things like this
- My best friend used to believe that when it rain and thundered that God was flushing his toilet. — Jelly Bean
- I used to beleve when i was 4 that the flush on the toilet was to wake up toilet monsters.— Millie
- I used to think if you didnt get up before flushing the toilet would eat you...Anon
- i used to think when it started raining it was god flushing the toilet— edel
- I was certain that rain was created by God having a pee and flushing his huge toilet above us— Emma H
- I used to believe that if you didn't close the toilet lid after flushing, you would get sucked down into it.— Maya