So the only reason people take care of themselves is to look good for the opposite sex? That’s approval seeking behavior. What about wanting to be healthy for themselves? Wheres the confidence? Wheres the self respect? This girl is unhappy and too weak to do anything about it.She may care, but not enough to make it a necessity. It's not a problem for her losing weight or staying in shape to get a man is it?
Why are you concerned about an Ex that's with another man?