I wonder if they make a mental list of things that they think make them interesting and then make mental note to inject these interesting things whenever possible in conversation upon meeting people, whether or not it’s appropriate.
Bob: “So then I was driving up the mountain when I hit a deer…”
Joe: “OMG WHAT A COINCIDENCE - I CLIMBED UP MOUNT KILIMANJARO WHEN I WAS 12!!”
Then again, maybe I just don’t care enough about impressing people.