Using make-up helps some women feel more confident about themselves. They seem to relax and become more out-going when they know they look their best.
Also, women's complexions seem to change in sync with their monthly hormonal changes. This is normal. Some may need a little extra makeup now and then to keep that confident attitude.
Now, if only men would learn to accept women as they are, with or without makeup.
... and if only I had learned earlier that the value of an ordinary woman with a pleasant personality is much greater than any bikini babe who whines, complains, and nags all day long.
Oh! And men don't "have to" wear makeup because we gain our confidence through what we do, and the recognition we get for doing it.
_________________
The mere fact that science may not yet adequately explain an object, event, or experience does not mean the immediate explanation should automatically default to a conspiratorial, extraterrestrial, paranormal, or supernatural cause.