I opened the car window a crack and my mother told me to shut it because I'd "catch a draft," which I interpreted as "catch a giraffe." I didn't question the sense of it, and just assumed it meant "to get a chill." I think I must have been learning about idioms at the time ("have a cow", etc.), because it seemed perfectly natural to have an expression that made no sense literally.
A childhood belief about speaking

others believed things like this
- I used to think that the priest at church was JESUS.
He had a beard.... it made sense— Joe B - I used to believe that broccoli grew on trees. It looks like a tree, so it made sense, right?— Catherine...
- i used to think that if i didn't celebrate my birthday each year my younger sister would catch up with me— q
- when i was 2 or 3 believed that i had lots of animals in my tummy it made sense my mum had baby in hers.— kjc
- I used to think that Batman was Blackman. He wore a black superhero outfit, so it made sense to me.Anon
- I thought Scott Joplin and Janis Joplin were related. Two musicians with the same last name - it made sense!— Rita