Someone explain this to me.

Why is it that I can accurately recall the names, storylines, and even the personal histories of hundreds of characters in my stories, even ones I haven't referenced in five years, but if I go to a party full of people I know I've known for a decade and some I have been introduced to only recently, including the gorgeous redhead in the revealing dress, I can't recall a single name?

It's Alzheimers, I'm tellin' ya.