actually know the answer to this, and it is due to the invention of the birth control pill. Here me out...\r\r Before a woman gets pregnant, she instinctively desires a true man as a mate. He will pass on his manly, strong genes to his offspring. But after a woman is pregnant, she instinctively desires a more sensitive guy to help with the child rearing.\r\r The birth control pill basically tells a woman's body that she is pregnant, and therefore she isn't attracted to real men. Slowly, real men are bred out of the gene pool, and the ones that are left are forced to adapt in order to find a mate.