I used to comment a lot. DH used to eat WAY too much junk food and in lager then normal quantities, not only was it not good for him it was also costing us a fortune!!!
That was about 6 months ago. Now he is back to being really fit, not eating crap and riding his bike all the time.
If my eating habits were getting out of control I would absolutely want DH to say something. I don't want to be unhealthy and not be able to keep up with my kids!
Since being pregnant though I have craved hot chips constantly and because of my ms all I've wanted to eat is bread and potato so unfortunately I have been eating very unhealthy! But as soon as I can stand the thought of flavours and other veggies I will go back to eating like a health freak
If DH wants some junk food as a treat I wouldn't say a thing. If its in moderation I would never comment.