I have just learnt from reading the submission by 'Fernando's wife' that Juice Newton sang "just touch my cheek" in "Angel of the Morning". Darn it, all these years I've thought it was "just rub my feet". I thought insisting on a foot massage from a departing lover was quite, well, demanding, myself.
When Don Henley sang "Boys of Summer" I always heard it as "Poison Summer".
When Jethro Tull sang about Aqualung "eying little girls with bad intent", I thought the words were "eying little girls with battered ten-speeds". Well, ten-speed bicycles were all the rage when that song came out, and I was very young and naive.
A childhood belief about misheard lyrics

others believed things like this
- Billy Squire sang about "My Kind of Lover". My wife sang about "My Candelabra"— Wailerman
- I used to think the lyrics of "Boys of Summer" said "poison summer"— Lindsay
- As a child, I thought that Olivia Newton-John was Elton John's wife and Juice Newton's sister.— Connie
- I thought "Angel of the Moring", by Juice Newton said "just brush me teeth before you leave me"!!!Anon
- i thought I got one year older when my family sang the birthday song.— I am the ghost
- I thought that the difference between girls and boys was that girls have teeth.
Anon