not a sexist comment (not that I give a shit about sexist talk and who is sexist and who isn't) but women don't really know themselves for the most part what makes them happy. I guess not different from men who don't know ultimately what will make them happy.
but often men in marriages and relationships men start relying or doing everything their wife tells them to do and when they do all those things wives are often continue to still be unhappy they get frustrated. "I did everything you asked me why are you still unhappy" then men start to feel their wife are not appreciative of what they do. and when a men thinks he did everything he could and his woman is still unhappy they quit and just stop giving a shit.
so it is pretty important to know as a man what YOU need to do to keep your partner HAPPY.