Nobody doesn't like mayonnaise. (Well, okay, I have a family member who fortunately lives far away who hates mayo.) Mayonnaise hidden inside things like tuna and chicken salad is almost always welcome. Like Canadjineh, I cook with mayo; slathered on chicken breasts or thin pork chops topped with thinly sliced red onions then baked -- yum.

Like your husband I rapidly tired of in your face fat and heavy cream does a number of my digestion. I have to make a actual effort to include fatty items other than full fat yogurt.

Sorry posted too soon!! Was going to say, maybe an infograph like the one above might help as it's easier then reading lots of sciencey stuff?

It's possible to overdo it with the fat. I know it's a high fat diet but if the goal is to burn body fat, you don't have to and it isn't a great idea to eat fat bombs and add huge amounts to meals. That's more for maintenance to prevent burning body fat.
You do of course need fat in each meal. Maybe it's just a touch too much. If he's feeling disgusted by it, it could simply be he's not hungry enough for it and that's suggesting it's being over eaten. If cutting back a little bit, by reducing amounts, not eliminating it in the meal, still satisfies the appetite until the next meal time, that's an opportunity to use more body fat.
If it's just the brainwashing getting to him, then he will learn in time and there's not a whole lot to do about that until he can't deny it anymore.
My husband has only cut back on breads and pasta. He really hasn't committed to actually counting carbs or trying to stay at any certain level. I mean, he's eaten an entire pineapple in the last 3 days by himself! He will NEVER believe a person shouldn't eat all the fruit they can stomach. And he has protested my use of cream and butter on our veggies. It took me months to get him to stop buying margarine! We eat a lot of lean meats still because it's generally cheap, and my hubs does all the shopping and he thinks fatty meat is gross. He trims all of the fat off his steak and thinks ribeyes are gross. Poor soul!
Anyway, I almost always make a cheese or cream sauce to add to my chicken or other lean meats but he skips it. He will put it on some veggies. I just let him use the amount of added fats he's comfortable with. Later that night when he's making a cheese and pepperoni plate (or loading up on fruit) because he's hungry, I explain that's because he didn't have enough fat at dinner and in his case, his body doesn't automatically, and easily access bodyfat when calories are low so he feels hungry often. After over 18 months of my constant and committed low carbing, he has no doubts about the effectiveness or health value but he still doesn't want to make the bigger changes to fully benefit from it himself.
I think all we can do is be an example and hope for the best.

Most of my fats come from heavy cream in my coffees and cheese. I use a lot of cheese. I get fattier cuts of meat like ribeye when I go out but at home I usually have a leaner meat with cheese or sauce.

Mine is understanding, BUT he has coronary artery disease and follows different dietary guidelines than I do. I cook kind of middle-ground. Since he's not low-carb, I know the high fat is bad for him. I do most of the cooking but I'll often find ways to customize. Or I'll get more of my fat in other meals or he'll get less fat in other meals since dinner is really the only one we eat together.

My husband has made many changes since meeting me. No longer are the days of processed, packaged foods.

He went dairy free when he realized he couldn't have it, and so did the rest of us.

With this one, he's so resistant. I think that sometimes, it's just been so engrained in our heads that low fat and low calorie is the only way.

At this time, I'm making dinner the way I always have: mostly paleo, with some rice or potatoes or other grains here and there. If I'm making something special, like tonight, it's pizza, I picked him and my daughter up a pre-made thin crust.

I won't cook separately for them, but I may do something a little extra so that they still feel like they're satisfied and I don't have to hear about it.

I also purchase them their cereal and bread and candy and chips for all the other times. I'm just hoping that MY own results and healing starts to speak for itself.

My vegetarian (more like pasta-, bread- and cereal-etarian) wife is supportive of me eating this way as she has seen how much it improved my BG and changed my appearance to the point where in the last couple weeks 2 separate people asked if I was a triathlete.

She has been struggling with weight since her hysterectomy a couple years ago. That hormone imbalance can do a number on you! It has also taken her fibromyalgia to the next level. I have started talking to her about the way her diet is not helping and showing her vegetarian options for going LC. She has had some significant stressors lately, so I have backed off.

She really loves when I make spaghetti squash or twice baked cauliflower casserole (without the bacon on her part) and some of the other side dishes. If I had the time to cook a proper meal every night, I think I could get her low enough just by cooking these types of things that she would begin to see an improvement and want to move further this way.

For a guy who never really cooked more than the basics (eggs, bacon, burgers), I have learned how to cook a ton of stuff in the last year plus since the diabetes diagnosis. It really isn't that hard nowadays given I could find a youtube video showing me how to make just about anything.

I didn't have to work too hard to convince her of the medical part because I have always eaten a ton of meat and cheese and been lower carb and my cholesterol has always been great and she has had issues with high to borderline high cholesterol. Convincing her it was the bread, pasta, cereal, sugar, etc. doing that to her, was fairly easy.

My wife was freaking out about it, so I started cooking for myself. I started losing a lot of weight, she counted calories and lost none. My doctor okayed the diet, my cholesterol dropped 30 points. She is perfectly fine with it now. It's not something she wants to do, but her tune might change when I hit my goal weight..

I am not sure if I am lucky or not, but my SO is a total convert, when I stray I am told off, and badly. We do the one treat-night a week, and that is our lot. As annoying as it can be, I absolutely love and appreciate the help and support he gives me. Because he sees how much it has helped me, and now sees the results on himself too, he has totally embraced this, and I am eternally grateful for it, as it makes it easier to stick with for myself too. This is becoming a lifestyle for us both.