Way back when in the mists of the seventies I believed that my body was made of baked beans, so if you chopped your arm up and looked down the stump it would look like an open can of beans. Looking back it was probably something to do with blood & ketchup being the same colour or the quantity of beans I ate and the expressions from a mother from Yorkshire.
A childhood belief about general

others believed things like this
- That baked beans were made of pasta! Spaghetti is?!Anon
- My mum used to tell me that baked beans were just peas covered in tomato sauce.— munky
- I used to think that
"The land of make believe"
was
"The land of baked beans."— Baked Bean! - I used to think people were called "human beans".— Dave
- I used to call the rays of light from the sun "sun BEANS". That's what it sounded like to me.Anon
- Until just a few seconds ago, I thought gherkins were beans or something weird like natto...Anon