I'd been wondering about that saying!
from Wikipedia: "Quince juice from organic farming is available in Germany (where quince is called "quitte") and its pleasant taste mixes well with other fruit juices. This is where the saying 'A quince for you, a quince for me, quinces we shall eat,' comes from."
New wondertime post here.
Also, remember those Thanksgiving recipes I was steaming over in July? They're here too. And if you think I'm making it all again now, for the actual real holiday, well, quinces we shall eat, if you know what I'm saying.