Chapter Excerpt: The Face by Daniel McNeill (thru RobotWisdom)
"The face has a master sculptor: the quest for food. Hence the mouth dominates everywhere, in toads and foxes, caymans and wildebeest. It is the portal where an animal assimilates the world, begins to change it from nonself to self. Hazards abound here and care is paramount. So three checkpoint senses–taste, smell, and sight–lurk nearby to reject poisons and generally tell ambrosia from ash. The taste buds lie within the mouth, the nostrils sit just above, and the eyes perch a tier higher."

Excellent!