old people

     If you listen to enough young people, you will eventually hear ( or overhear ) the conversation of at least a few young people who have no idea what an old person is. They don't have an idea of how long people live. They may never have met anyone old enough to have gray hair. They don't understand that old people may not see or hear as well as they once did, or that they might have difficulty getting around. These young people must have been raised by parents who never introduced them to their grandparents--the parents' parents.
     If you work with young people, or know young people, try to introduce them to some old people. They might find one another interesting.