In my room I have a heating vent in the floor of my bedroom. When I was little I always asked my mom if I could open it, but she'd say, "No, it's crusty in there." So I thought she meant there were old pieces of moldy bread crusts in the vent. I really hate bread crust, so I was scared of my vent.
A childhood belief about crusts

others believed things like this
- I once thought a vent in my hotel room led down to the center of the earth.— flarn2006
- I believe that there is a monster in the air vent and watches me when I put on my clothes— Blablabla
- my friend thought that if he ate the crust on bread, his hair would be curly.Anon
- If you ate the bread crust you would be able to whistle.Anon
- I used to belief that the crusts on bread had more vitamins— mims
- I used to think that crust was a special coating put on the bread— Hayley