[But if he started voicing his every mean thought out loud, what would be left of his running inner monologue? It's 90% judging and complaining. His head would be so empty. Echo, echo.]
Ah, I should hope it's not because my looks displease you that you would suggest such a thing. [Yes, okay, now the gears are turning - can she actually hear his thoughts, is that what's going on here? It's possible she can pick up on this gear-turning, too.]
But if you say so, ma'am. That is, after all, a commonly echoed sentiment. [PLEASE if a pretty face didn't help tremendously, terrible people like Sebastian would get nowhere ever.]