Why do so many women get fat and lazy after marriage?

My friend got married about 2 years ago. Back then, his gf was in shape, decent looking, and a great cook. She could make amazing lasagna. Now that they've been married for a few years, she has put on some pounds, rarely wears makeup or even dresses up anymore, and she tells him to make tater tots for dinner because she's too tired from work to cook anything. What happened to women of the 50s that took pride in how they looked and had a hot meal nightly for their husbands? Now, since they work they think they can get away with this behavior and just dress however they want and cook 1 or 2 meals a week? Wow. And they wonder why they are divorced and left for some younger bimbo by the time they're 40? Look in the mirror women...and clean yourselves up!