Papa Tom, I know exactly what you are saying. When I am not riding and see someone else riding I get a sudden pang of jealousy. I didn't ride yesterday because I rode on Wednesday. My rides are all over 20 miles, so I try to put rest day between them, one of my few concessions to age. However, even on a rest day I get a twinge if I see another rider out and about. I retired last year and set a goal of a minimum of 80 miles per week. I am yet to not meet that goal, and, yet, I always feel that pang when I am not riding and see another riding. I think that the words of H.W. Tilman best explain the need: "For that man who makes his way by his own exertions, no day is dull, and no journey without an abiding interest." In his book Snow on the Equator, Tilman describes his final journey before leaving Africa. He bicycled the "road" which eventually became the Kinshasa Highway across Africa from east to west. That was in the late 1920s.