Sexual Value
Sexual value is by far the most important form of value you can contribute to a woman's life. It contributes about 70% of the value in a relationship, while social and monetary value combine for the other 30%.
Women judge a man approximately 70% on sexual criteria and 30% on everything else. People tell you that great relationships are build on compatibility and chemistry (social value). While you need social value too, the foundation of great relationships is always great sex. If you want to have good relationships, you must become good in bed. Otherwise, you'll only score 30/100 in her book, even if you do everything else right and financially support her.
If order to be extraordinary in bed, you must do two things. I writing a full post on becoming good in bed soon, but here's a brief summary.
1. Psychologically satisfy a woman by completely dominating her. At their core, women want a guy who will treat them like a piece of meat in the bedroom, that can pin her arms to the bed while he ****s the **** out of her and makes her tell him what a slut she is. Think Tyler Durden ****ing Marla Singer in Fight Club. That's what you're going for.
IMPORTANT NOTE: This is NOT how women want to be treated outside the bedroom! Given the choice, she will pick the guy who treats her like this all the time over a guy who cannot dominate her, but ideally she wants a guy who can love her and appreciate her as a person outside of bed, and also knows what she wants in bed. Most guys can't do this because they have inner game issues and are secretly disgusted by girls acting like sluts in the bedroom. You have to learn that there is nothing wrong with female sexual desire, and that she can be an intelligent and wonderful human being and still have those desires.
2. You must physically satisfy her needs by having the size, strength and stamina to **** her hard for long periods of times and make her ***. Obviously size you can't do much about size, but as long as your **** isn't freakishly small, it's nowhere near as important as strength and stamina is the bedroom. Increasing your strength and stamina is akin to training for a powerlifting event or a marathon. In order to become good you need some basic technique, then it is just a matter of training your body until you are a superstar.
You'll know when you're contributing more sexual value to the relationship than she is when she starts wanting sex more than you do. At this point, you are in control of the relationship. You are contributing more sexual value to it than her, and you can continue it on your terms indefinitely.