For ages, I thought the line in 'Free Nelson Mandela' that goes:
'His body abused, but his mind is free'
Was actually...
'His body abused by these mindless freaks.'
A childhood belief about misheard lyrics

others believed things like this
- When I first heard Matt Monro's song "Born Free," I thought he was singing "Porn Free."Anon
- When i was a tiny lad, I used to think drug free zones were places where you can get drugs for free— Spencer
- I used to think that "extra body" shampoo meant you could use the runoff suds to clean your body.— Christy
- I thought if food said it was fat free it meant you could eat as much as you want without getting fat!— Brainhead
- i thought an ATM machine was something which gave free money!!— Armani
- I used to think that money from ATM machines were free :p— qwerty