Ok, obviously I'm not a guy
but personally, heavy make-up always disgusted me. When I was in middle school there was one girl who always wore heavy blue eyeshadow, bright red lipstick, rouge, the works, and probably used a full bottle of hairspray every morning. She was in seventh grade - so was probably around 12 years old.
I did wear makeup in high school, but I soon decided it wasn't worth the bother of "putting your face on" every morning. It takes a lot of time to do it right! Now, I wear lipstick when I go out for a nice dinner etc, but 99.9% of the time I wear no makeup - and that works well for me.