It looks like the new Cadillac CTS is the linchpin of a campaign by Boston advertising mavens Modernista! to sex-up the brand. Which is why they've got Grey's Anatomy star Kate Walsh speaking to us in her sultry voice, telling us the real question she asks when she gets into a car — "When you turn your car on, does it return the favor?" Our question we ask when hearing that particular question is "Which box do we check to get that particular vehicular option?"