Professor Colin Jones writes for The Times on how technology is changing how we present ourselves. Professor Jones said smiling had become clichéd, and we were more likely to adopt the kind of frosty glare associated with public figures such as Anna Wintour, editor of US Vogue: “The world of the selfie, the wonder of narcissism, the selfie-stick and the way that seems to make the smile absolutely everywhere. It is the way in which we establish our authenticity in the world.”