The older one gets the older everything else in general feels and the harder it becomes to believe that one is learning anything or is capable of being surprised by anything anymore.
So I was heartwarmed (and, obviously, slightly flummoxed) by news from a very close 30-something friend that she had just learned how to use Eftpos cards. This week. Yes, this very smart and well-educated friend found herself in the supermarket line when she realised she'd forgotten her credit card. Recalling that she had left it at home, she called her husband and asked him to bring it down. He, sensibly, asked why she didn't just put it on her bank card. It was then (over his hysterical laughter I assume) that said friend learned one's bank card cannot be used simply at ATM machines but to pay for goods and services at a wide variety of locations.
One can only dream that such a delightful surprise lurks around the corner for all of us.