Because they don't go with everything.
WHY DID YOU CHANGE YOUR AVATAR??!?!?!?Well, I'm the guy with four pairs of red sneakers.
Right??? I identify people by their avatars. I keep reading his posts and going "who the f is this g... oh, I see".WHY DID YOU CHANGE YOUR AVATAR??!?!?!?
I DON'T LIKE CHANGE!