Another misheard lyric: I was sure the Beach Boys were singing "Help Me Rhonda, yeah...get her outta my car", and I imagined that there was a girl who was sick or drunk in his car.
"Get her outta my heart" is correct, but less fun.
A childhood belief about misheard lyrics

others believed things like this
- I used to believe that gum was made outta pig fat becuase of what my dad told me. I believed him for years.— Maddy
- A common misheard lyric in BMTH’s ‘Shadow Moses’ is “THIS IS SANDPIT TURTLE!”— Oli
- I always wondered why shepherds washed their socks by night. (correct lyric: watched their flocks)— MaggieNJ
- When I was younger, I saw Madonna's video for "Material Girl". I thought she was singing "I'm a Cheerio Girl"!— Greg
- When i was younger i believed that a cat was a girl and dogs were boys.Anon
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops