I'm very much like your husband , but not as overweight I don't think.
As a man, it is very difficult (for some ridiculous reason ) to confront and deal with a weight issue.
My partner 'nags' me, but only because she doesn't want me to drop dead and leave our child without a father , let alone the impact it would have on her.
The problem is, the more I get 'nagged' about it , the more resistant I become. It's like my weight is my defiance, my individuality, the thing I can stick two fingers up to the world at. For what seems like a simple enough issue to change, it is incredibly psychologically complicated.
I know all about food and healthy eating. I know about portion sizes and exercise. The problem is there is a bigger voice somewhere saying ' fuck that, have a sausage sandwich pal '.
The only thing I can think of is that I need something else to give me the same hit, the same feeling of satisfaction as the food does. When I find it and start to get my self esteem back I reckon I'm 80% there.
As for your husband..does he have a hobby that would help him exercise more? there's a 'man v fat ' 5 a side football initiative just started for overweight football fans. Maybe he has an overweight friend that he can challenge to lose weight for charity ?
I wonder if losing weight was a more ' manly' thing to do , it would be easier somehow? . Maybe I'm talking rubbish.
Good luck anyway.