I thought DC Mayor Marion Barry was actually a husband and wife mayoral team (Mary & Barry). I would always wonder why Mary would let Barry do all the TV appearances.
A childhood belief about names

others believed things like this
- I used to think that the title of Barry Manilow's song "Looks Like We Made It" was "Looks Like Tomatoes".— close2nd
- I thought "Virgin Mary" was actually "Verge 'n Mary" and that Verge was a nickname for Joseph. — Rachel
- I used to think virgin mary was actually 'virginia mary'Anon
- When I was little I thought that a honeymoon was when the Husband and wife went to the moon and eat honey.— AmAnDa
- When I was a kid I thought Mary had a little lamb whose FLEAS were white as snow.— jen
- When I was three I used to believe that cow and horse are wife and husband.— xenia