I used to believe that when the judge sentenced a criminal to an impossibly long sentence (like 100+ years) that they kept his body in prison after he died until it was there for the whole sentence.
A childhood belief about criminals

others believed things like this
- I used to believe when a person was convicted of a crime and sent to prison, his lawyer went to prison, too.— Tara
- When i was younger i believed that when you died your soul use to go into a monkeys body— Ríoghnach
- I used to believe that you could stretch a rat's body to be super long.Anon
- Until I was about 11 or 12 I thought that "prostitute" referred to a female criminal.Anon
- I used to think a con artist was someone who painted pictures in prison.— Brandon Campbell
- I thought "prison" and "prism" are the same words as each other.Anon