It's the line
"I know what I am, I'm a man I'm a man and so's Lola" that gave it away, then?
( Flapjack I spay a little mare for you, Thu 7 Jul 2005, 9:20, archived)

that's the cookie
but you know how it is, a song's playing in the background and you don't really pay attention to what they are singing.
I did not have a copy of it to call my own till this year, so only ever heard it as background (i.e. on the radio)
( just mike, Thu 7 Jul 2005, 9:25, archived)