Understanding each other

I really wonder why men and women from two different,really different planets, should live together?
I am not saying that I agree with being lesbian or gay, but I mean why there is no real way to understand each other's side?
I believe in almost all cases women have to forget their desires...
I am always asking myself,why he doesn't care? why he doesn't know how to behave in this perticular situation? and so on...
we are different and this is not a problem af any of us...but if we want to live together forever as we promised once, we should find a way to see from each other sight.