There is something about symmetry that tickles the brain, literally.
“I would claim that symmetry represents order, and we crave order in this strange universe we find ourselves in,” writes physicist Alan Lightman in “The Accidental Universe: The World You Thought You Knew.” “The search for symmetry, and the emotional pleasure we derive when we find it, must help us make sense of the world around us, just as we find satisfaction in the repetition of the seasons and the reliability of friendships. Symmetry is also economy. Symmetry is simplicity. Symmetry is elegance.”