When my mom was a little kid she heard a song called "I"ll See You Tonight" a lot. She always wondered what the guy singing meant when he sang,
"I'm not talkin' 'bout the linen..."
It was not until college that she was told it was actually
"I'm not talkin' 'bout movin' in..."
A childhood belief about misheard lyrics

others believed things like this
- When I was 'bout 4, I used to believe that
people with mullets were "in- betweeners" as in not boy nor gurl.— Kristen - When I first heard the song "Constant Craving" by KD Lang, I thought she was singing "God save gravy."Anon
- When I heard "Don't Come Out Tonight(Bad Moon on the Rise), I thought they were saying Bathroom on the Right.— helen.sellers
- When I first heard Matt Monro's song "Born Free," I thought he was singing "Porn Free."Anon
- When Madonna sang "let the choir sing" in "Like a Prayer", I thought she was singing "love by proxy"— Kristen
- The song called heart of glass mixed me up as a kid. I heard "Heart and ass". — oops