I realized tonight that often when I am talking to non-comics and they make jokes I am responding with smiles or laughter not to the actual joke, but the moment when their eyes look at me to indicate that they have told one. If I catch a dude out of the corner of my vision with joke eyes, I will always respond with a friendly affirmation of receipt.
Number one, this makes me think I am a nice but callow person.
Number two, this makes me think that older comics do the same to me.