Plato and Aristotle defined art as imitation, or mimesis. Art imitates or represents reality. Yes, but why? Why do we enjoy such imitation, and is it, beyond its entertainment value, of any real use? We are accustomed by now to the demand that all human behavior be explained in terms of its evolutionary value. But in what way is imitation useful for survival and not just a party trick? The first step in answering such a question is to point out that artistic