is it really true that men cannot understand women?

is it really true that we, as males can understand nothing at all about women? is it true that we can not understand anything at all about the female gender whatsoever? yes, i know that we cannot know everything, but that hardly means that we cannot understand anything. we have mothers. some of us have sisters and daughters. some of us guys even have wives. yes, we are not women. yes, we never were little girls, but why does that mean that we cannot know anything at all? can anybody ever really know anybody? can talking to anybody really reveal anything? will asking females about what they are like really produce anything that we could understand? can we even know what our own gender is like? are we every male on earth? why do we have to know everything to perfection? perhaps women and girls are more fascinating because we can know so little about their gender, but that does not mean that we cannot understand anything at all.