"And you know more about goats than I ever will, so we're even."

That's... kind of the way it goes. Everyone's knowledgeable about something, even if it's only themselves.

"And you've already told me more than I ever knew about what things are like where you're from. I haven't even heard of those places before, so you're still a step ahead of me."

He's not just being generous, he's being honest. It's a much bigger universe than he imagined. Much bigger.