Women core to cooperation, men more yes men...

http://www.sciencedaily.com/releases/2013/06/130626113654.htm
during high mutual levels of cooperation with a romantic partner, men typically experience an "inphase" response to their significant other's emotions. That is, if the woman in the relationship is feeling more positive, the man will feel more positive. If she feels less positive, he will feel less positive.On the contrary, it seems women experience more of an "antiphase" pattern during high mutual cooperation. If her partner is feeling more positive, she will tend to feel less positive, and vice versa.

Social psychology literature on cooperation tells us that women generally tend to cooperate more, while men often try to avoid conflict. Thus, men might be subconsciously syncing their emotions with their partners' during cooperation in an effort to avoid conflict or reach a speedy resolution, Randall says.

If that's the case, it's possible, although Randall's study didn't test for it, that women may pick up on the fact that their partner's agreeability is not entirely authentic. If she suspects he's not really as positive as he seems, or that he has an ulterior motive, she may become less positive herself in an attempt to get at his real feelings and reach a more mutually satisfying resolution, Randall suggests.
"If you think about a couple that is trying to cooperate with one another, the man might go along and say, 'oh sure, honey, this is great, are we almost done?' whereas the women might say, 'I'm so glad that you're happy, but I just want to talk about this one other thing because I think we're really getting at a resolution,'" Randall said.