I used to believe (and i admit i sometimes still do) that when you were away from your house for over an hour at night, when you came home the first person to use the toilet would be attacked by a burgler hiding behind the shower curtain who had been stealing from the house and had hid away in the bath when he heard people come home.
A childhood belief about criminals

others believed things like this
- I used to believe that when you moved house you swapped house with the person moving into your old house.Anon
- From the ages of 4-10 (I'm 10) I thought a "Cat Burgler" was a person who stole cats.— MarkoPolo5000
- i used to believe that when a person moved away, they switched houses with the person that bought their house— alli
- I used to believe that when you moved houses, you traded homes with the person whose house you're moving into.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
- My brother (who was 6 at the time) would never flush the toilet in fear of our new house being blown up! Anon