An old man gets on a crowded bus and no one gives him a seat.
As the bus shakes and rattles, the old man's cane slips on the
floor and he falls down.
As he gets up, a seven-year-old kid, sitting nearby, turns to
him and says, "If you put a little rubber thingy on the end of
your stick, it wouldn't slip."
The old man snaps back, "Well, if your daddy did the same thing
seven years ago, I would have a seat today!"