Just ask him "out of curiosity".
When you get an answer, we'll be happy to help you. You sound like a good son.
Welcome to the FTF community. When you get a chance, please head over to the New Member Introductions forum and introduce yourself to the folks.
“If ye love wealth better than liberty, the tranquility of servitude better than the animating contest of freedom, go home from us in peace. We ask not your counsels or arms. Crouch down and lick the hands which feed you. May your chains set lightly upon you, and may posterity forget that ye were our countrymen.” ― Samuel Adams