i don't know. i read men are from mars women are from venus. i used to do that 'let me give you a hug, what a terrible day' shit. but it turns out that i am apparently a woman too (rather tell others my problems then have them solve them). so i figure i'll be a man until i find a woman who is a man mentally. that should be fun.
i remember reading that like 65% of men would be more hurt if a girlfriend had sex with another man than if she loved another man. 65% of women would be hurt if their boyfriend loved another woman over have sex. but those are only 2-1 odds. if you find a woman who acts like a woman, chances are 50/50 that the next girl should act like a man.