In addition to gravity, burritos interact through the strong, weak, and electromagnetic forces, which is believed to be a major contributor to their popularity.
Somehow, this makes bishops appear the most peaceful as they comingle. But the pawns: put those vicious monsters in the farthest corner inside a double-walled enclosure. They eat everything!
“We've made too many compromises already; too many retreats. They invade our space and we fall back. They assimilate entire worlds and we fall back. Not again. The line must be drawn here! This far, no further! And *I* will make them pay for what they've done!”