Also, eating.. pickiness too. I don't mind leftovers, hell I don't even mind eating the same thing for a week, two, etc. She hates leftovers and always wants freshly cooked. Also rotating food types, as it can't be too similar to what she ate recently.
All combined it means that finding hearty meals (and now keto for us) are more effort for her than for someone like me. To no surprise, I have no weight to lose (I need to workout to even maintain weight), but it really frustrates her at how different our bodies are.
She considers her food habits to be an "addiction" in large part due to how different her and my reactions are to food. Her struggles are far more than mine on this front.