Well, I have not always had an expensive pen, but I HAVE always had A pen with me. I am somewhat of a germophobe, and I hate grabbing the communal pen to sign a credit card receipt, for example. Think about this the next time you go to the pharmacy to pick up your prescription, and they ask you to sign on that little sticky to acknowledge the pick-up of the drug... I can be 10-cent pen; I'd still have my very own everywhere I went.
Juan