It was a logical question, he supposed.
"When I was nine," Hawkeye would begin, "My Grandfather bought me a small rifle. I was so excited -- you have to understand I was the only kid who had one -- and so eager to try it out. I found a wounded rabbit and tried to put it out of it's misery. It was the bloodiest mess I've ever seen. I started out so enthusiastic, and ended up sobbing and shaking so hard I could hardly get home." A pointed look would follow. "I haven't touched a gun since."
A logical answer.