pedanther

"The Dutch in Old Amsterdam do it
So do Siamese twinges
In Dorset, even doors do it
Though they fall off their hinges

Birds do it, bees do it
In Afghan hounds little fleas do it
Let's do it
Let's fall in love!"

(Frank Muir's semi-extemporised version, from an episode of "My Music" I was listening to earlier this week)

...that's the only one I recognise for sure, although a couple of the others give me the impression I'd recognise their choruses too.