I don’t see the question as wrong either. Perhaps if he left off “By you in particular.” it wouldn’t have been seen as offensive. Because people already go after Dunham because of her looks, they automatically assume that is what he was doing. He simply wants to know why the character, contextually, needs to be naked, as there is often no reason for it. It’s why some of the Game of Thrones actresses have stated that they won’t do nudity, because there it was often written into a scene with no real reason for it.