What does the oil in makeup do for your skin?

I know that the oil may cause breakouts but what is the difference as far as how it looks? Oil free vs. regular?What does the oil in makeup do for your skin?
Some use it as a filler or to hydrate the skin. Some people with dry skin are able to use oil based foundation and not have any breakouts. If you are prone to oily skin then this will have the opposite effects and cause breakouts.What does the oil in makeup do for your skin?
Its suppose to be like a moisturizer but it usually looks almost wet and gross. Not good for your skin either.
first of all it causes clogged pores so that in turn makes it look unnatural. a little bit too fake. even if you put a little on, it looks like a whole lot.
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