Except her hair wasn't the part of her that weighs 400 pounds.

Yeah. McDonald's is worms!

Because abuse is hilarious. No matter what OP said they do NOT deserve to be hit for it. I think OP's girlfriend deserves to be single after pulling that stunt.

It would probably be better to be single.

I agree that you shouldn't make your partner feel bad about their weight, looks, intelligence, or what have you. However, if they are living in a lifestyle that is very unhealthy, you should try to encourage them to behave in a more healthy manner. And this can be achieved in such a way that it would not be offensive. You could try leading by example by preparing healthier meals, going for walks routinely, and maybe even visiting a gym. Even cutting out one or two things from your diet, like drinking water instead of soda, or grabbing some fruit when you are craving something sweet, can reduce your caloric intake substantially. We tend to pick up some of the same habits as the people we surround ourselves with have. If she sees that the OP is willing to do these healthy ideas himself, she may be more inclined to start doing them with him. Diet and exercise are so much easier to stick with when you have someone doing it with you, especially if they live together. If after you have attempted this and they still choose to live an unhealthy lifestyle, drop it. After all, it is their life, they are old enough to make their own decisions, and they have the right to live in the manner that they see fit. You did the best you could to help them. And you can't help someone who doesn't want to help them self. Fear of failure is a heavy motivator as well. Also, it is concerning that she hit him. That needs to be addressed just as much, if not more, as her unhealthy diet. I have endured an extremely abusive relationship that involved having my face smashed into walls, getting punched and kicked numerous times, and even being viciously rapped with a 4 inch blade shoved inside me, and I was so foolish as to not say anything about it until after we had been apart for almost 5 years. But because of that experience, I will never, NEVER, allow any form of abusive behavior to be tolerated. And it shouldn't be tolerated by anyone, ever!

@44 the movie is called "Super Size me" :-)

Thankyou 45 :)