I haven't moved

An elderly couple was moseying down a country road in their old pickup truck. A young couple in a shiny new pickup passed them from the other direction. The young man was driving and the young lady was sitting right up next to him, as close as she could get. He had his left hand on the steering wheel and his right arm around her shoulder. As they passed, the elderly lady looked at her husband and said, "Look at that! Remember when we used to travel like that?" He turned toward her and slowly replied, "I haven't moved."