My kid asked me, 'Why do we have to say Merry Christmas to people we've never met?' I said, 'It's polite.' He said, 'I've never met the mailman. I don't know his name. I don't know if he's merry. He might be having a really bad day and the only thing he wants to hear is that his package is in the lobby.' I said, 'That's not what I said.'