A raunchy Mexican teen comedy with surprising depth and the nerve to confront subtexts that normally get short shrift in pictures aimed primarily at young men. Though 17-year-old Tenoch (Diego Luna) and Julio (Gael Garcia Bernal) come from very different backgrounds, they're best friends. Tenoch is the son of a wealthy politician and lives in his parents' luxurious house, where his old nanny caters to his every whim. The son of a single mother, Julio lives in a cramped apartment in a shabby housing complex. Fresh out of high school, the teenagers are facing a long summer without their girlfriends, Ana and Cecilia (Ana Lopez Mercado Ortega, Maria Aura Boullosa), who a...