Young Women, or Old Girls?

A few minutes ago, sitting in the Sac City quad, I started thinking about the ages of the people walking by. I'm not really sure how old most people are here, probably about 19 to 24 (not including the "life-long learners"). They are adults, but they still look, dress, and act like teens in a lot of ways. As girls (or women, perhaps) walked by me, I looked at their faces and tried to imagine how they would look and act, as well as who they would be, if they had lived a few hundred years ago. Putting them in a dress from another era, I was surprised at how mature they looked. Many of them would likely have settled down by now and be raising a family and running a home.

Do we grow up slower now? Emotionally, I mean? I think we must. After all, I'm certainly not planning to marry at 17.