^It's not the nudity; it's the helplessness. Both were helpless to do anything for each other. Glenn was ready to die to keep the prison a secret but Maggie told the Governor to save Glenn. They were both victimized by other people, so it's natural for them to feel depressed and angry, but Glenn is having a much hard time than Maggie. I agree with others upthread that it is mostly his male ego that was harmed; he couldn't protect her OR himself and that's where all the anger is coming from.