Its been my experience that men are always ready and women are not always ready. At least for me. I don't need it all the time. But men seem to be able to and want to anytime all the time. It makes me feel like a vessel when its "expected" of me.
I don't mean to generalize, I know that not all men and not all women are alike, I'm just speaking from my own experience. I have yet to find a man who can take it or leave like me. I have yet to find a man who doesn't get mad when he's in the mood and I'm not. I know those men exist, I just haven't found one.
So mellors, I don't know how to answer your question......I guess just be understanding when the woman isn't in the mood. The more men push or get angry, the less turned on I get, until eventually, I don't want it at all.
I might be really jaded though, these are just opinions based on my past experiences.