Why Do People Have Faces?

This is the question that arose during the first seder, when we were talking about the wise son, the wicked son, the simple son, and the one who is just too young. The Haggadah (Passover seder book) used a kind of abstract paper tearing (in a Wiggles meets South Park kind of way) to show that the four sons were all stages or aspects of each of us.  No one had a face, prompting the question from 4-year-old McQueen, Why do people have faces? 

The adults explained that faces hold some of our most important senses, like eyes for seeing, ears for hearing, noses for smelling, and mouths for tasting. McQueen pointed out that chins were for thinking and showed us how, adding that he also liked to think with his cheek.