When I was about 8, I though that if someone flushed the toilet when you were in the shower, the water would turn off and never come back on. I am now 29, and my son is afraid of someone flushing the toilet when he's in the shower!
A childhood belief about bathrooms

others believed things like this
- 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 when I peed in the shower as a kid, the water coming back through the showerhead was my pee.— gregg
- I used to beleive that if you flushed the toilet that it would explode and all the water would shoot out.— Michelle
- I used to believe that take a shower meant to go steal a shower from the storeAnon
- 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 think that toilets led to the shower head. That's why I never took a shower :D— scared