I used to believe that cartoon characters hung out with other cartoon characters when not working, that Bugs Bunny would sometimes have Mickey Mouse and Tom and Jerry over for dinner. I never saw any cartoon characters roaming around because they all lived in California.
A childhood belief about cartoons

others believed things like this
- When I was smaller I used to think that if I broke the Tv the characters would come out x]Anon
- I had alligators and cartoon lions under my bed.— ruth
- I thought Bonnie and Clyde were fictional characters.Anon
- I thought that "slipping someone the Mickey" had something to do with Mickey Mouse— stymie
- Before the invention of the camera, everything looked like a cartoon with the quality/effect of oil painting.— MD Caruso
- i used to picture jesus as a kind of cartoon Tarzan, swinging through the trees...— bex