How come most ladies are so good with maturity than men?

I honestly think one reason, at least partly, is parents raise girls to be more mature and responsible. (Although there are plenty of parents not raising either one to be mature). Parents expect more of girls and tend to just expect boys to be less mature and responsible. I've actually heard parents say, "of course he's irresponsible. He's a boy." And of course there are parents who expect a lot out of a boy.