When I was in high school, I was on the stage crew, stage make up team. I did some really dramatic faces, including "monsters". Not the best application for daily life make up!
But we used a lot of the same principles of shading and highlighting. That was about 40 years ago.
When I was a teen, I ironed my hair straight, outlined my eyes with black, and wore white lipstick and nail polish. Obviously, those ways are not in style now! :P
In my twenties and thirties, lip gloss, mascara, and a light blush were all I used. I also did too much tanning in the sun (oops).
More recently, I've attended professional facial aesthetics classes, which included the use of makeup, analyzing skin and face types, skin care, waxing, and various facial techniques. (All the cool spa stuff.) Very interesting.
I also attend long-term, regularly scheduled skin care/cosmetics company's training sessions. Also, very informative.
As I get older, I can compare the various stages of age that I have experienced, and how those stages effect skin care and cosmetics. What worked for me in my twenties, with oily skin, brown eyes, medium brown/red hair, and different life style, doesn't work for me now with dry skin, green eyes, gray hair, and new activities. As the years go by, we can't stick with the same styles and products. Time marches on. :P