Thanks Lina, now I am temporarily off the hook for an original. I must follow with another Silverstien:

How Many, How Much

How many slams in an old screen door?
Depends how loud you shut it.
How many slices in a bread?
Depends how thin you cut it.
How much good inside a day?
Depends ho good you live 'em.
How much love inside a friend?
Depends how much you give 'em.