Is the emotional high, they get from them. Women love to be emotionally stimulated in all different sorts. If they stay to neutral or stable for too long, they'll doze off, and look elsewhere to get some of their emotional highs met. Women are also unstable by nature and to keep themselves sane, you better or gotta be prepared to take them on an emotional rollercoaster, to keep them at the tip of your own fingers, which keeps them on their toes, keeps them second guessing, and hence in doing so it would keep their emotional needs in-check.
