The Bee Gees song...'You should be dancin' the line
'What you doin in your bed?'
I always thought (up till I was 28 actually) was
'doobley doobley dare'
Why I thought that I have no idea, but hey if the Stones can hum an entire section of 'Paint it Black' then why not?!
A childhood belief about misheard lyrics

others believed things like this
- My sister once asked her mother why she didn't paint her black....Anon
- I always thought that "Staying Alive" by the Bee Gees was sung by Aretha Franklin.Anon
- i thought the line "saving my face" from the KT Tunstall song of the same name was "shaving my face"Anon
- When I was i kid I used to believe that if i strained too hard while doin #2 I would poop my lungs out...— K.Gordon
- I thought the line in the song "more than a woman" was "four-legged woman".— boo
- When I was little, I thought that clouds were made by someone spraying white spray paint onto air.— Hadla