Lol
We guys have this believe that girls use makeup to deceive us by hiding their real appearance. Let's look at it this way, you are in a market all of a sudden you are attracted by a fruit. So you decide to buy it. On getting home already salivating over the fruit you then opened it only to see what's on the inside. A normal person will person would feel cheated go back to the store and ask for a refund.
That's the same way guys feel when girls deceives them with makeup ( especially the ugly ones). Now if you are naturally beautiful why dont you flaunt it and occasionally you can use makeup then everyone will know that that girl is a double threat (fine with or without make up).
No guy wants to wake in the morning to see a beast after the makeup have washed away.