Not the Jake Thackray number that goes

"After work on Friday
I was waiting for a bus
my mouth was dropping open
and my gaze was vacuous
and in the British workmans Classic pose
I was leaning on a door
when half way down the wormy wood work
quite by chance I saw
a little hole

I know it sounds rediculous
I know its awfully odd
but I suddenly felt like
giving that little hole
a furtive prod
I pushed my finger in
and then I waggled it about
but once I'd got the bleeder in
I couldnt get the bleeder out
of the Hole