For some reason, I thought it appropriate.
My theory for today:
You never really know anyone. Ever. It doesn't matter how long you've known them, it doesn't matter how close you may think you are to them, you never actually know who they are, and you'll never know who they are. So when you're taken by surprise, and those people you once thought you knew so well turn out to be complete strangers, don't say I didn't warn you.