An older couple was driving down the road on Sunday afternoon. She was leaning against the door on her side -- some would say polishing the chrome -- and he was driving. They were eager to get where they were going, but were slowed down dramatically by a young couple, who were cuddling in the car before them -- the young woman was almost sitting in his lap, rubbing his face, and now and then kissing him on the cheek, and ever now and then -- though it was dangerous -- he would turn around and kiss her. They were in no hurry at all -- that is, in no hurry as far as moving the car along.

Finding it impossible to pass, the older couple finally began to strike up a conversation. The woman looked across at her husband, then looked ahead to the young couple, and she asked her husband, "why don'…