I don't see why it's sexist maryhoffman. If this were a forum mainly populated by men, I'm sure they would cite a few examples of women overspending - my SIL being one of them! She will ONLY buy brands, the more expensive the better.
DBH always did a Saturday top-up shop, and was pretty good at spotting bargains, but would then buy the weirdest and most expensive beers he could find, and all sorts of expensive little snacks.
However, he has been at home for some months (ill) and my careful budgeting, as we have less income, has gone out of the window. It's driving me mad, I have to explain exactly why I choose what I do. As I have always been really careful to buy for quality rather than brand, it's galling having to go through the precise meat and fat contents of various sausages every week because he doesn't believe me at first, and seeing him come home with teeny pots of expensive olives that he considers a tasty nibble between meals, rather than having them as an extra with salads and meats. We have veg growing in the garden, but he will go out and buy leeks rather than pick what we have. I have had to explain, as if to a child, that if he eats two of a (bought) cake in one day, there won't be a replacement, he will have to go without one day, until the next shop, as if he is a child.
This isn't sexist, it's just what happens when one person has always realised they have to stick to a budget, and the other person hasn't.