I have very fine lines on either side of my mouth from grinning ear to ear and four very fine lines on my forehead because I raise my eyebrows too much. I raise them when I ask a question, I raise them when I am surprised, I raise them in greeting when I am on the phone and somebody walks by and tries to get my attention. I think I'm pretty much the only person who notices them, and that is mainly because I wish they weren't there, but they are, so that's that.
Anyway, I'm 27 and never took any especial care of my skin and don't moisturize anything like as frequently as I should, so I guess I get what's coming to me.
Oh, and I also have zits too. And blackheads. Horrid skin.