As a boy, I had a toy farm with various plastic animals. I knew where milk came from and when I noticed the nipples on the toy pig I assumed that was how bacon was extracted from pigs - as a sort of liquid that was laid out to dry and solidify.
A childhood belief about general

others believed things like this
- My dad used to tell me that "smoked" bacon came from pigs that had been fed on a diet of kippers !!!— Tony . Newcastle on Tyne
- when i was little i thought pigs ate only tomatoes because bacon and ham was red when cooked.Anon
- When i was little, i thought that pig latin came from pigs. I was so frightned to eat bacon afterwords :S— Juber
- when i was about three i suddenly realized where bacon comes from....from unborn pigs eggs of course— planetnewbs
- I used to believe that like chickens lay eggs, pigs laid sausages...Anon
- When i was really little, i thought that pharmacy was a shop where you could buy animals, like pigs and cows.Anon