If that's Fat then Color Me a Chubby Chaser

I got in an argument with someone at work today. We here talking about the movie The Duchess ad how much we hated Ralph Fiennes character. Only the person I was talking with said she couldn't understand why his character would rather be with his fat mistress. My mouth was agape. I couldn't believe she was calling this actress fat but I guess anyone looks fat next to Keira Knightley. This went back ad forth for awhile. BLAH!!! I was so annoyed. Let us take a look at what is suppose to be fat and what is suppose to be ideal. I'm not saying Keira is not beautiful, she very much is but to say that the other actress is fat and couldn't understand why a man would want to be with her is just ridiculous.