I was once told that whatever you dreamed was what you would be later in life. Ex: If you dreamed about murdering somebody, you would grow up to be a murderer. This still terrifies me as I have dreams involving kidnapping and murder.
A childhood belief about sleeping

others believed things like this
- I used to believe that if you dreamed you were falling and you hit the ground, you'd die in your sleep.— Knoot
- I thought Clydesdale was a place dreamed up by a little boy named Clyde.Anon
- I thought the song Shattered Dreams was acutaly "Shadow Dreams" and wondered what shadow dreams were— Golgademon
- I used to think that everything involving the name Alice had to be Wonderland or Looking Glass related.Anon
- i thought split personalities were like having dreams. the dreams i had were all my personalities!— Odd Dreamer
- I used to believe that "sue" meant murder, so in movies when someone is getting sued I got really confused— I don't know