This is a story that I think sums up why women string along betas, settle down with them, and then leave/abuse them. Twist though; it's from a male perspective.
Story: So you're a decent looking guy, and you get a modest amount of female attention. You have to play some game to get an attractive girl but there's usually an option available to you. There's this woman at work though, she's infatuated with you and also happens to be incredibly needy/overweight. She usually goes out of her way to be nice to you, brings you supplies you might need for your desk, helps you out with last minute deadlines, and is generally nice and encouraging, always trying to give you an ego boost. But you hate her. Something about her just annoys the fuck out of you and you couldn't imagine pumping your cock into her everyday for the rest of your life.
One office party however, she brings some homemade chicken wings in and they are the best god damn wings you've ever had. Now you look at her a little differently. She has something you want, her delicious meals. So you keep her around you, generally ignoring her texts, calls, and sexual advances because you detest her, but you need her favor of you to continue so you can swing by whenever you need to to get some delicious homemade food before you go out and jam your dick down the throat of that tasty new receptionist. You tell the fatty that you aren’t interested in sex because it’s ruined things in the past for you; meanwhile you’re fucking every tight piece of ass that looks at you twice.
The years go by however and you realize that all these nasty sluts will never be able to cook meals for you the way your beta friend will, so you finally relent and enter into a relationship with her, and soon after you’re married with a couple of kids. You have sex with her pretty regularly with her at first, but it’s gross, you simply aren’t attracted to her neediness/body, so you reject her more and more, making her cook the fanciest of 5 course gourmet meals to earn the chance to suck your dick for a while before you give her a few minutes of pitiful missionary right before you pass out. She’s unhappy with the sexual arrangement, but every time she says something you get pissed and she ends up baking you a magical chocolate cake just so that you’ll forgive her.
Then one day she finds out, you’ve been fucking hot tail on the side this entire time. She’s distraught, doesn’t know what to do, but eventually she wants to make things work and cooks you a fucking feast like you’ve never seen before. The good meals just aren’t enough to counteract the lack of sexual satisfaction anymore though. So you peace out with dirty redhead paralegal who has a body that just won’t quit. On your way out however, you tell beta fatty you’re taking the kids, and she’s going to be required to send you all tasty meals anyway because the court has decided that she’s responsible for maintaining your standard of living. Later bitch.
Analogies: Fat bitch is like beta male. Cooking is like beta male’s money/resources. Sex is sex. You are like a modern day woman.
Edit: Lot's of people are making valid points in the comments, like the guy could just go to a restaurant, learn to fucking cook, or use his wife's infatuation with him to convince her to work out/work on her appearance. That's kind of my point, women could also do all sorts of things to improve their money making potential, but instead they pick the easy way out by latching onto some poor sucker. I know it's not a bullet proof analogy, but it get's across some key concepts, and it was ton of fun to write. Thanks for the gold.