“Do you even vape?” the world seemed to ask of California Rep. Duncan Hunter this week. “Yes,” the Republican congressman responded with gusto. “I vape.”

The genus Selfie of the family Narcissus contains many species. There is the Selfie brunch and the Selfie drunk. There's the Selfie nail game, the Selfie duck face, and the Selfie humblebrag. But naturalists have only just begun to study a fascinating new breed, the fruit of a tremendous technological innovation in…