The Original Sam

I'm not sure. I'm twenty-seven, live in a college town, and all the nineteen-year-olds I meet seem terribly young to me. Heck, most of the twenty or twenty-one-year-olds do, too. Some of the twenty-four year olds, though less commonly.

((On the other hand, my sister is twenty-three, and in every way that matters she's older than I am.))

Anyway, I want to stress that I'm not saying you're wrong about nineteen not being that young -- I'm saying that I think it's relative, depending on who's talking.