W.L.
I would explain that you have a problem with your body the same as he does his. Then ask him if he still finds you attractive, and he says yes, I would say exactly!!! That is my point, EXACTLY!!! I would point out the fact that you both have changed and that you both have insecurities about your bodies, but if he finds you attractive then how could he expect less of you. I would also explain that you aren't so shallow of a person that you are attracted to just looks, but rather the entire person. The scars and being heavier is what happens in time and they are just book marks showing where you two have been together throughout your marriage. They are proof that there is love and affection that is much deeper than the surface.
My husband is very attractive,but just had 22 lipomas removed. He looks like he got into a knife fight and lost. I personally don't even look at them. I don't care in the slightest, but I can tell you that every scar will remind me of having to go through the whole ordeal and it will remind him that I was right there by his side. My 2 C-sections left my stomach not close to what it was and he swears it doesn't bother him at all and I truly believe him. If it weren't for those surgeries we wouldn't have two of the four children we do.