The song that says something like "Wild thing, you make my heart sing...". My sister convinced me that it said "Wild think, you keep my house clean." I'm not sure whether she believed it or not.
A childhood belief about misheard lyrics

others believed things like this
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops
- in the song "show me heaven" i used to sing "make me breakfast" instead of "leave me breathless"Anon
- I convinced my sister that chocolate milk was made out of Keebler cookie elves, she believed me for a month— Rainbow Steel
- I thought the song "Party Time" by Moby was actually saying "heart attack" (this was before I knew the title)— Elviessa
- I used to believe that you shouldn't swallow gum because it would stick to you heart and make it stop beating.Anon
- I thought that singer/songwriter was spelled this way: sing-a-song-writer...Anon