Though the grossly sweeping overgeneralisations in this thread make me cringe, it's not impossible that overweight people come from family backgrounds that lacked a culture of home cooking, as that often goes hand in hand with education and health awareness. I'd also say, however, that that is not as clear-cut in times of both parents working and increasing numbers of "non-conventional" families. Portion sizes, metabolism, and lifestyle matter a lot, as does the background of the people you're dating. All the women I know know how to cook; after all, reading is not hard if you come from a background where home-cooking was normal.