lol!!!
they shed becouse their bodies grow, their scales dont.
our skin grows with us, theirs doesn't.
it gets tight and there in starts the begining.
it begins to losen from the new scales, slightly bigger than the last.
and a fact i just recently learned.
a snake continues growing and shedding till the day they die.
they never stop growing. interesting huh?
most animals stop at some point. lol