You're mid-sentence about your terrible day when they nod at their phone. You keep talking anyway, describing in excruciating detail how the barista spelled your name wrong, and they're still nodding—at their screen. So you decide to test it: "And then I got bitten by a werewolf." More nodding. "It was actually great, very refreshing." Nodding intensifies. You've now accidentally told them you enjoyed a supernatural mauling, and they'll never know because they're reading about celebrity divorces from 2019.