 Puberty is your body going from being a kid to an adult. Adolescence is the identity crisis that is about figuring out what does that mean, and it's not really about puberty. It's partly about hormones, but it's largely about what am I going to do, because I've got to figure out how to specialize. But it was a one-time thing. You had to figure out what you were going to do, and you did it until death or retirement.