Makeup?

So this is a question for the ladies... Why go through the makeup routine? I have never seen a woman (who took care of her skin/self), that didn't look better, more natural, more... oh I don't know, maybe the word is "herself" without it, than with it. With all the foundtions, mascara, eye shadow, and on and on. Sure, maybe a light touch of lipstick, or a little of this or that; but why do some women slather on all thae makeup? This question came to mind when I read something the other day about a mother trying to find less expensive makeup for her daughter who was ahving a girls makeup party.