When I was little and knew nothing about the Simpsons except that they were a TV show, and that there was one called Homer, one called Bart etc. I mixed up Lisa and Maggie's names.
A childhood belief about cartoons

others believed things like this
- I thought Oklahoma was named after my Uncle Homer. (Pre-Simpsons)Anon
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops
- I used to believe that there was an actual show, listed in the various guides, called "To Be Announced."— Donna
- I used to believe the show Law and Order was a gardening show called Lawn and Order.— Adriana
- I believed that the breed of dog called Boxer was called that because they could stand up and box.Anon
- I thought that the show Beavis and Butthead was called Penis and Butthead.— Porky's Butthole