It's universal. Some places have fewer reports about it due to culture, but the rates, reported or unreported, largely stay the same. Chances are, if you've gone to a city or have met more than one hundred people in your lifetime, you've known someone with it. It's not always very obvious or dramatic, and people can have it and live completely normal lives.

[Of course, when he's nervous, he will spout trivia. Yay, trivia!

He doesn't look offended at all. He looks down at his feet and crosses his arms over his chest. He's feeling a lot more vulnerable than he's comfortable with.] Then... well, in case it wasn't clear, I'm glad you feel that way. That you're not scared, I mean. Or look down on me or think I'm going to collapse at any moment or something like that.