well consider this, every month a woman's hormones go completely out of wack and can send her into all sorts of unknown/hazardous emotional territories.
i guess we expect guys to be like a good 4 wheel drive. to be able to navigate the rocky terrain with us. but as it is, guys tend to maintain their one state (you should really be allowed a trial run with pms. it'd be an educational experience
i guess there's a certain expectation for someone to be sympathetic and be able to say/be all the rights things at the right time. i'd blame it on the uterus