My wife will occasionally poke fun at the fact that I have put on weight over the past few years while she has remained relatively the same shape and weight she was in college.
One day she joked about the subject a little too much and hurt my feelings. She immediately felt bad and tried to make it up to me by telling me how amazing and wonderful I am and offering me the chance to call her, "my fatso wife".
So I took it. Mistake.
Even with permission it is never right to call your wife a fatso. Especially when she is the most beautiful creature to ever grace God's green earth. I love you honey.