When my wife and I moved in together after we got married, I realized how terrible her eating habits were/are. She never really learned how to cook. It’s weird because her Mom is an okay cook, but she never cooked with my wife and taught her anything about meal planning or preparation. Her family also has weird eating habits. Her brother will not eat vegetables (except potatoes). Her father will not eat any kind of lettuce. Her mom hates chicken! As a child, my wife refused to eat anything except ice-cream untul she was about 4 years old. She was also significantly malnourished and underweight as a small child. Her parents told me this one time, and they were laughing and joking about it (WTF!!!). Growing up, I think her Mom didn’t want to cook very often, and so her Dad would just grill hamburgers about 5 nights a week.
So, I had to learn how to cook within the first year we were married, because she would not put out much effort to learn how. 12 years later, I cook about 95% of the meals now. It’s kind-of a thankless job, but it is better (and cheaper) than eating fast-food and junk-food all the time and weighing 450lbs and dying of a heart-attack at age 50. I also have type 1 diabetes and need to count carbs for everything I eat. That makes it extremely difficult some days, especially when my wife brings home cookies, cake, ice-cream, chips, non-diet soda, etc.