I used to think that the Elton John song "That's Why They Call It The Blues" went "That's why they call it a loo." For years, I was certain that the song was about a toilet, although I don't know why anyone would want to sing about one.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe the the Elton John song, "Crocodile Rock" was about a Crocodile, named Rock.Anon
- As a child I used to think that Olivia Newton-John and Elton John were married.
Boy, I was way off.— Lisa - As a child, I thought that Olivia Newton-John was Elton John's wife and Juice Newton's sister.— Connie
- I thought the song "Karma Police" was actually saying "call the police" before I learned the title— Alberto Richardson
- if you stand on your nose and sing the blues you wont get hiccups for a month.Anon
- I used to think the lyrics to Elton John's Tiny Dancer were "hold me closer Tony Danza."— kstawitz