Men, we are a simple folk. We can go for hours being hungry when we are doing something fun. If I am hiking or playing video games, I can go forever without food. Ladies, by contrast, have their emotional epicenter intimately wired to their stomach, and that monitor is sensitive. When that monitor becomes sensitive, she will become sensitive to your insensitivity, even when you were actually being quite sensitive.
You begin to prepare for everything once you have been in a relationship long enough. When a journey with my wife takes more than an hour I bring snacks. This is both thoughtful, earning kudos for me with her, and insurance. If I forget snacks and that monitor goes off, she will reach over, grab each of my ears, and bite off my face.
Learn from my mistakes, I beg you, feed your woman a snack about two hours following any regular meal. If you have no woman, be sure when you find one to feed her. You will avoid many arguments by simply keeping her fed. It won't give you carte blanche to be a cad, you still need to be thoughtful, sincere, and a good listener, but it will lengthen her fuse.
Trust me.