Why do people make Foundation for?

Foundation does four things. The first thing, and the most important thing, is it gives your skin a nice texture for holding your other makeup on. If you have some foundation, today wear foundation under your blush, tomorrow just put blush on your bare skin. You'll probably find it's a little easier to make your blush look right if you apply it over foundation, and it'll stay on a little better over foundation. (Same deal with all the rest of your makeup.) The second thing is, it's good for protecting your skin from the rays of the sun. Third, it evens out your skintone. And fourth, it can cover small blemishes and discolorations. You don't HAVE to wear foundation, but I know when I put makeup on someone I always use it.