With more than 70,000 respondents, The Great Male/Female Surveys have revealed that men and women have very different perceptions on just about everything. As experts in their respective areas, AskMen and Cosmopolitan.com set out to discover just where the gender divide falls. Whether it's marriage, sexting or even the size of his "package", there are certain topics that are doomed to ignite violent arguments between the sexes. Here are 10 of them.