I know men that HAVE lost all interest in their wives because of their wives looks. It seems shallow, nut men are VERY visual. But from my own personel experience, I think woman are harder on themselves about their own looks. I NEVER complain about my wifes weight problems, and yet it is a MAJOR libido buster FOR HER. It's the whole body image problem for her. Look at any relationship experts advice, and I think you will find that virtually ALL of them say that staying in shape is EXTREMELY important. It easily has to be in the top 2-3 things that you can do for a marriage. Men should too! Shed that beer belly, get more sex!