At certain historic moments, grandparents took on childrearing responsibilities. In many cultures, they still do. Chinese grandparents who are able to retire at 55 are seen all over Beijing bouncing grandbabies. In the United States, we can't afford to retire at 55.
There's a very fine line between a groove and a rut; a fine line between eccentrics and people who are just plain nuts.
It's not just the kid who's spent every penny from his job to upgrade his car to tell the world he cares about sports cars, it's also the person driving around in a fuel-conscious hybrid electric car, because it's more a message to the world than an effective means of saving fuel, to be quite honest