Though it’s nearly impossible to define “cool,” there’s a familiar image that exists in the pop culture canon (Regina George; Sebastian from “Cruel Intentions”; Draco Malfoy) and being cool is something so many young people grapple with in our teen years and beyond. But MTV News caught up with UVA’s Hugh Kelly Professor of Psychology, Joseph P. Allen, one of the leaders of a recent study on cool kids, and he explained there’s proof now that trying to conform to the popularized definition of cool doesn’t have great — nor even last...