I was 12 or so and heard the lyric "Wild Thing--you make my heart sing" as "Waltzing--you make my heart sing". My wife thought "Radar Love" was "Red-eyed Love", and her sister thought "Gypsies, Tramps and Thieves" was Gypsies, Tramps and Beads".
A childhood belief about misheard lyrics

others believed things like this
- I am Canadian and when I was little I would sing "True Pastry Love" instead of 'True Patriot Love"— Jess
- I used to believe that only people that were in love had a heart.— Nikki
- When Madonna sang "let the choir sing" in "Like a Prayer", I thought she was singing "love by proxy"— Kristen
- I used to think you could have a heart attack if you fell in love too deeply!Anon
- I used to think you could have a heart attack if you failed to fall in love.Anon
- I used to believe that the heart at the beginning of the I Love Lucy Show was made of real chocolate.— Krissa