I have some CIO friends. I respond with something like "that doesn't work for us." Anything with too much elaboration- will start a heated debate where someone is going to feel their sleep style is being judged. If that's an argument you want to have, go for it, but just to move the conversation along, be brief and talk only about yourself, answer calmly and confidently. But, if you have the urge to talk about it more (or your husband does) then I agree, that might be a signal that he (or you) wants to do something differently.