Help me get this SONG OUTTA MY HEAD!!

OK, Kids.
Put your "thinking caps" on:
This song (from the early 80s) is running thru my head; I sang it to Mark - he has no idea.
The beginning has (what I believe to be) a 12-string acoustic strumming....going down a scale.
Then the bridge has a phrase, with an "echo" effect: something like: "What are we waiting for-for -for ....?"
THEN, later on in the song, the guy sings in a screeching falsetto:
"WHO'S BEHIND THE DOOOOOOOOR???" (or something).
I THINK I know who it is....but not sure....HELP!!

Put your "thinking caps" on:
This song (from the early 80s) is running thru my head; I sang it to Mark - he has no idea.

The beginning has (what I believe to be) a 12-string acoustic strumming....going down a scale.
Then the bridge has a phrase, with an "echo" effect: something like: "What are we waiting for-for -for ....?"
THEN, later on in the song, the guy sings in a screeching falsetto:
"WHO'S BEHIND THE DOOOOOOOOR???" (or something).


I THINK I know who it is....but not sure....HELP!!
