I've read all the posts. I'm sorry that all of your husbands eat in a manner that turns you ladies off.
My parents didn't allow that kind of table manners and I eat like a gentleman like I was taught. Occassionally when I'm at a New Orleans po' boy kind of shop and they have a sloppy double meat sandwhich, I may forget myself, but that's the only time.
I don't slurp my soup or my drinks. But I do get messy hands when I have wet BBQ ribs at a really good BBQ place, but I don't root with the hogs or imitate their manners.
Suggestion: Set up a hidden video camera with sound and record your husbands eating. Then, play it back to them. Not immediately, but when he is resting and relaxing.
I can't imaging my self not taking a shower or brushing my teeth if my wife asked me (Hopefully nicely.) And I've never turned my wife down, even on the rare occasion when I'm not feeling up to it. (No pun ladies.)
Good luck to you and yours.