Why David Was No Goliath

It's a question everyone asks when viewing Michaelangelo's greatest sculpture:

Michelangelo's David is meant to be a representation in marble of the perfect male form. So why did his creator not make him - how would one say - a little better endowed?

The answer: David was a perfectly accurate sculpture of a young man about to do battle with Goliath, and Michaelangelo, the perfectionist, made every detail accord with reality.