Flex your macho organ - your brain! Show a woman you know your POWER RULE from your CONSTANT MULTIPLE RULE with this informative and entertaining DVD - Bikini Calculus. The How-To-Do Girls put learning and sexy-time together to make you a better man.

These videos are becoming the standard tools of macho men on college campuses around the country. Have a sneak peek at the video below and tell us these curves don't make Calculus crystal clear!