Then there was "Where Do Broken Hearts Go", and I recalled Darren asking me that question. At that time, the reply I gave after some thought was something like
"I think they don't go anywhere. They stay there broken, because while you can mend it, the seams of the cracks will always remain."
But I've found a new answer.
"Dey get flushed down teh toiletz."
Makes a lot more sense.