People get wrinkles as they get older because the skin looses its elastin, and it looses collagen. Because of this the skin tends to get thinner and does not receive enough moisture. The layer of fat skin will start to disappear which causes the epidermis to start sagging. All of these causes wrinkles as we get older. You can also get wrinkles from being in the sun too much. If you take good care of your skin you can prolong the time frame of getting wrinkles.