Beard and Mustaches.
I had started growing a mustache when I was 13. Some older guys were amazed that I was so young and had my "stash".
I kept it all through high school. It kept all of the upper class men from harassing me by looking older.
I shaved it off in college...
Then in college grew my hair in back long. It was down to my shoulder blades, then had to cut it when I got a job.... They said that it didn't look respectable enough for their image....