Tell him what kind of things you need to hear. Honestly, I know he should spontaneously be able to tell you stuff you want to hear but lots of men have no clue what this is.
In fact, get him on here (put asking tape over your screen if you have to
so he can't see your MN name...
Dear Mr Loulou...
This is what your missus wants to hear:
Loulou, your body made our beautiful children, atom by atom, and I adore every single one of those atoms for doing that. at this point, you throw your arms around her and look her, smiling, in the eye
or
Loulou, your body is so womanly and sexy, oh god, I just need to feel it next to me at this point, grab her waist and make your intentions very clear
or
Loulou, you are the most beautiful woman I ever set eyes on, and when I look at your incredible blue/brown/green/red eyes, every other woman (supermodel, film star, whatever) just turn invisible as far as I'm concerned get a bit of 'deep and meaningful gazing' practice in before hand
or
Loulou, I only ever wanted you, a real, living, beautiful woman who looks like a goddess to me. But look, if I can help YOU feel better about your body in any way - not that I care how you look as long as you're near me and feeling good - then here's my credit card/a free spa weekend/a couple of nights in the city with your girlfriends shopping for feelgood clothes/a pair of fuck-me shoes to put on right now...
And Mr Loulou, it really doesn't matter if these things don't come naturally right now: just get a bit of practice in at least once/twice/seven times a week and it will soon feel very natural 
Any help?