Jean Hannah Edelstein reflects on the effect of taking selfies on the onlooking bystanders: “It’s human to be vain. But it’s also human, I think, to find other people’s vanity a source of excruciating embarrassment. In our moments of most profound narcissism, as we hasten to capture our most flattering moments, let’s try to spare a thought for the innocent bystanders who cringe and blush as we tap our phones.”