John Krasinski is the Sexiest Man Alive — but what makes someone sexy in the first place? Here's what science says.
Each year, People magazine crowns a Sexiest Man Alive, and while the title often comes with plenty of debate (no Ryan Gosling? seriously?), there's no doubt that past winners like Channing Tatum and Michael B. Jordan, and this year’s John Krasinski, have far more sex appeal than the average Joe.