Consider a cut
apple, which after a short time exposed to air, turns brown as free radical damage (oxidation)
does its its dirty work on the fruit's
flesh.
You have the mama's boys and daddy's girls (this type seems to
do no wrong and is forever pushing the limits to be the
apple of their parents» eye), the rebel with a flaw (this type is difficult in behavior but
does no wrong in his folks» eye), and whooping boy (this is the type who has to pay for everything with an inch of a
flesh and a switch).