i started makeup at a young age and i think it did affect my skin about junior high (in a bad way) I stopped wearing makeup as much in college; no time. Also, i have combination skin and after a few hours my face feels grimmy and i can't stand it. so i opt out of not wearing anything for class except concealer. but i still buy makeup hoping i'll get into the habit of it more. i envy girls who can wear makeup all day and feel comfortable with it on. i always rub my eyes or wipe my face to wake myself up. :-/