Though remember that most of these conversations happened when I was actually in college (a few even before then, while applying to schools), and I just have a really long memory.
(The conversation with the friend that sparked this musing was last night, but I've been friends with her since she was 14, and so our conversation topics include anything that was fair game back then, which is basically everything.)
He's probably early-20s, fresh out of school, and that's still a huge part of his life experience.