Why do guys think they are sooo much better than women?

its so annoying, girls have to have there period which is the worst thing ever,and guys dont say well we have to listen to you ***** when your on your period? get a life!? ,then women have to give birth? women have to carry that child for 9 months? And men think they r soo great? ugh can men bleed for a week and live? i dont think so? And guys think they are wayy stronger then girls. ya some guys are, but thats just because guys are built that way? so **** off? and why r guys soo sexist against girls? ya i know i sound sexist right now, but im so tired of guys sometimes. but i was listening to girls run the world, and my older brother was like girls dont run the world? and then he started singing, girls, they dont run the world because they're weak and lazy? And guys don't have to always worry about what there hair and makeup looks like? Why do guys think they are so much better then girls??