theory of relasstivity

Theory that a perfect ass has three attributes:
1. Lower butt - The lowest part of the ass, should be firm but not hard.
2. Middle-earth - Middle of ass, should be softer than the lower butt and stick out more.
3. Heaven - Highest part of the ass. "As above down below". Should be similar to lower butt.

Damn Joe, that ass definitely follows the theory of relasstivity!