If there's one thing that's been impossible in these millennial times, it's trying to teach our parents (and grandparents) how to use modern technology. They just can't seem to grasp the concept that you can't put Liquid Paper directly on a computer screen, or that emails don't need a postage stamp. Anything you told them about instant messaging would go in one ear and out the other.
When it comes to smartphones, though, those days are long gone. Nowadays, the olds are just as tech savvy, and just as addicted to the tiny screen as we are. Sure, they still like every single photo you put up on Instagram, and they still write "Dear Son" at the start of WhatsApp messages, but they've really gotten the handle on how to use them. Forget about zombies - these are the signs of the end times.