There are girls who look very pretty without makeup but on special occasions they will wear make up anyway, just to accentuate their features a little. It doesn't mean girls are less pretty when they're not wearing it, it just means... Well its like a shirt and tie. If a guy wares a shirt and tie it doesn't really make the guy look better because it adds color or accentuation that he should naturally have, it just seems a little more formal, a little more classy.
but at the same time, if a girl is always wearing the stuff its like "why are you hiding your face, don't you know your beautiful? don't you know I like you how you are?"
With, because 80% of girls looks better with make up. But then there are girls that look really good naturally, and then they ruin it by wearing way too much make up, but that's girls with a wrong image of themselves, as you should notice this yourself. I mean if your skin is perfect and you don't notice anything on your face that could be corrected with make up, don't use it, or at least not a lot of it.
I've seen my fear share of girls without make up, trust me, keep the make up on, the chances are biggest that you look much better with ;) But if you look good natural, nothing beat a naturally beautiful girl, that doesn't look cosmetic or anything.
Teehee my sister go from a 6 to a 8.5 when she does her hair and makup but then again she has to whipe that 8.5 face off every night... Her husband will know about it one day lol so basically it looks better but then again it is also fake =P