IT is a plain, sunny morning in Burbank, California, and Ashton Kutcher, ever in a cardigan, wearing one of those winter hats that sit on his head like a potato sack pulled back to the neck, is singing "I'm a douche!" He's dancing to it, even. Sort of. Flouncing, more like. One-two-three-four. Four steps up, lock arms with a homeless person on the street set, do-si-do with the woman pushing a grocery cart, keep going. "I'm a douche!" He's lip-synching, actually.
He's not, of course. A douche. It's a line asserted in character, his character, at the front of the chorus, a full-out song-and-dance routine for Two and a Half Men, the marathon megahit that he famously became one of the men on a year and a half ago. Everyone…