"I was not prepared to shoot my eardrum out with a shotgun in order to get a deferment," Bush told the Dallas Morning News in 1990. "Nor was I willing to go to Canada. So I chose to better myself by learning how to fly airplanes."
UPDATE: Read this, too. Wow.
What was Bush doing with his youth? He was drinking. He was drinking like a fish, every night, into the wee hours. For decades. He gave no service to anyone, risked nothing, and did not even slack off efficiently.