Who is Don Draper? That's the eternal question on Mad Men, but could the answer be as simple as "Zou Bisou Bisou"? As Don's sultry new French-Canadian bride, Megan, Jessica Paré has been knocking everybody's socks off all season. In the premiere episode alone, she throws Don a surprise birthday party with a French-pop serenade, right before the most erotic rug-cleaning in TV history. "She's a character of light in a landscape of really dark people," Paré says. "Everybody in the ad world is so sarcastic and sardonic. That makes her the weird one." But she has one thing in common with the other ladies in Don's life: "A little bit of a naughty sexual habit."