When I heard that, I thought it was about marijuana, "key" being doper slang for kilogram.
I’ve got a brand new pair of roller skates,
You’ve got a brand new key,
I think that we should get together,
And try them on to see...
Although it’s been decades since I’ve had skates that used a skate key to... uh... mount them onto my shoes, I do remember the tight fit.
Hmmm. And the overwrought, banging piano chords leaves little to the imagination...