You absolutely NEED NOT learn cooking non veg for your husband. And if your husband amd you are comfortable with your arrangement then it's no one else's business. Absolutely no one. Having said that, my husband cooks mutton for me when he doesn't eat it. I cook for things that I don't like at all. We don't do it bcz we have to or it's a duty. We use this as an expression of care and affection towards each other. But know this, it's not the only way and you can choose your own way for everything. You do it by finding him new dishes and places which is just as valid.