Getting investment from the women you meet is key to succeeding with them. As you get increasing amounts of compliance from girls, they become more and more comfortable having you take the lead and doing what you ask of them. They respond more positively to you in every way.
You want to get compliance early and often; the more you get, the more quickly things progress, and the more smoothly. Get a woman contributing from the start, and you improve your chances of success with her.
Now... want a way to do all that faster, better, and more efficiently, with stronger results?