Recently a bar code was taped to mail box, and not to anyone else's mailbox around us. I wondered what it was, so I asked the mailman. He explained that he has to read that code on various houses in his route so that the post office can monitor his pace.
"Oh," I said. "I thought there was something special about me."
"There is," he replied, "But this has nothing to do with that."
Good one, mailman!