I used to think that the beach boys song "Barbara Ann" was "Bob Bob Baran" and that they were talking about a guy in the song, which made perfect sense to me because for the longest time I thought that the Beach Boys were girls (becuase of their voices). I didn't find out it was Barbara Ann until one day I asked my mom when I was about 12 why a guy named Bob, Bob Baran would "lick someones hand" (I thought it was "...he licked my ha-a-and..") and she cleared me up....
A childhood belief about misheard lyrics

others believed things like this
- We knew a woman named Barbara Hannah, and I thought she was was in charge of Hannah-Barbara!Anon
- I thought that the difference between girls and boys was that girls have teeth.
Anon - I thought the Til Tuesday song said "Books are scary!", rather than "Voices Carry"Anon
- I used to believe that a cow-lick meant that a cow had licked you when you were a baby.— Lindsay
- I always thought when I was a kid that Milo is for boys and that milk are for girls. . . — Cathyia
- i thought cats were girls and dogs were boys. Anon