And, of course, if you do pass the ketchup to X, guess what happens when he wants the mustard, also within his reach. So, he knows now how to get ketchup and mustard, but we all know that, so not much value. The Ys that know how to get BBQ sauce, onions, chipotle, etc. quickly lose interest in participating and go have their own Bar-B-Que rather than continuing to support the lazy Xs (and the spiteful Zs) of the group.