Why, exactly, are you thinking about my breasts right now?
Clearly you appreciate my slender physique, but why are you compelled to tell me not to "change a thing", while you knowingly, or perhaps sym-pathetically nod at my chest. You think you are a respectful, modern-minded male, but here you are exposing your ignorance, tactlessly baring it for all the world to see---caught with your pants down.
There really is no right thing to say in response to a comment that is so very wrong, except maybe: Your fly is open.