Most good looking females get everything in life handed to them, without having to work for it. This makes most of them expect people to clean up after them, or make them food. I say most because there are those smart girls who, for whatever reason, are self-sufficient and do in fact cook/clean. The ones who won't are stupid. literally.

Women's' rights are another thing which caused women to start losing the skills which were previously practically innate. Women have taken this whole "equal" thing way too far, making females and males not on the same level, but rather raising women above men. Nowadays many women believe men should do most of everything for them, and so won't waste time doing things they can get other people to do for them. (See above)

A third reason for this drop-off in cooking and cleaning among everyone in general, men included, is that more people are going out to eat, or ordering in. Fast food has become so commonplace that many people eat out for 95% of their meals. This however is one thing which doesn't change when you look at smart women, in fact, smart women are more affected by this by stupid ones, simply because they hold better jobs, and their family members do, so they can afford to eat out all the time. Good looking girls simply get asked out on dates a lot, and get other people to pay for their food.