Well, reading everything down this discussion brings up some of my own thoughts of being the skinnier spouse. Back when I was married, I'd lost 75 lbs to get down to a healthy weight for my wedding, and kept it off for the 5 years we were married. In this time, my husband started packing on the weight, and it did bother me. Not from a "ew gross" point of view, but more from a withdrawal point of view. I feel like I started withdrawing, not only due to other "stuff" where the relationship just wasn't working, but because he was 12 years older than me, and his father had recently died at 62. This was not due to his weight - it was due to cancer.
But the fact of the matter was... I was afraid and already preparing for him to leave me a widow already! Not only with the age difference, but with his increasingly bad food habits, the fact that I couldn't really do things WITH him, (the one time I took him hiking with me down to the lake and back, I thought he was going to have a heart attack), etc. It just made me feel very old, and gave me a lot of worry and concern about things that I didn't feel like I should have to worry about yet at 26 years old.
My current boyfriend is 3 years younger than me, but like I've said in some past posts, has some weight issues. I talked to him about it when I first started my weight-loss this time around, fully intending to put my feelings up front, and then letting it drop. Because if it turned out like my husband, it would have the exact OPPOSITE effect. When I talked to my husband about changing some of his eating/exercising habits, he would pack the snacks I suggested replacing his cookies and chips with IN ADDITION to the cookies and chips.
In any case, I told my boyfriend that what bothered me about my husband more than anything else was the prospect of being left alone... and not having someone I could share activities and LIFE with. I told my bf that while his weight didn't bother me, it bothers me that his father was recently diagnosed with diabetes. It bothers me that he eats so many fries and cookies, and even though he's only 27, it's going to catch up with him, and it's artery-clogging stuff. I think I put it in a little more sensitive terms than that, and offered some solutions as opposed to just nits.
While he still has his french-fries once a week or so, the rest of the time, he won't have them, has a baked potato, or a salad instead. On the cookie front, he's started eating fruit and some of my fat-free low-cal snacks instead. We've started making "dates" on the weekend to do some power-mall-walking or go bowling or do something physical. He usually does the shopping, and I asked him to be "diet sensitive" when getting stuff (for me), so I make shopping lists for him, ask him to look at the calorie/fat/sugar-carb contents, etc., and he's started doing that for his own food. (He's eating whole-grain everything now, too). He's also starting to drink my flavored waters more frequently too.
I stuck by my initial concept of "lay it out there" and don't nag, but he's really embraced it, and I think he also worries about the diabetes stuff, his dad, and my weight as well as his own (even if it doesn't mean he loves me any less if I'm heavier). In any case, he's lost about 10 lbs since Christmas too, even though I'm busting my butt in the gym 3 times a week and he isn't...

But even though I've always loved cuddling with him like a big squishy teddy bear, it's pretty neat seeing his waistline slimming down, and hearing him complain that his pants are too big. It gives me some encouragement to keep going too. (Although I haven't been to the gym since Saturday because I'm sick.

)
--Janis