Part of my dislike of human interaction stems from the fact that I can't remember people's names.  And since I know what it feels like to have someone call you the wrong name, I have an immense fear of calling other people the wrong name.  I've tried the tricks like repeating the name in my head 7,000 times or writing it on my forehead in reverse so it shows up correctly in a mirror, but nothing works.  I freeze up under pressure.  And a lot times, it's not that I don't remember it, it's that I'm not completely sure.  This happens with people from other countries (sorry Asian people, Sung is too close to Chung for my brain to remember the difference) and people who work or are otherwise closely associated with other.  If two guys sit together at work, my brain says, "That's Jim and Bob.  Jim and Bob sit there.  That area contains Jim and Bob."  If I see Jim or Bob away from his respective counterpart, I usually won't remember which one was which, and likely won't take a chance at guessing.