The trouble with youth is that it's wasted on the young...

(I can't claim the credit for that one, unfortunately - my father
says this regularly... I know I have a problem when *I* start to
think it as well.)

Well that makes at least 9 over quaddies (sorry, I'm ten shy). But that 
quot.:

youth is wasted on the young

...is a hoary old one, with the corollary:

money is wasted on the old!