It seems that all some couples can do is fight. But that's nothing compared to some animals. We're counting down the top 10 most extreme examples of animal sexual diffrences, and seeing how we compete in the battle of the sexes. While male baboons aren't always so bad, the female mantis eats the male's head when mating! Discover why men and women seem to come from completly diffrent planets when the battle of the sexes is taken to the Most Extreme.