This Mexican movie from 2001 is a favourite of mine.
If you're in need of a teen road movie that's more than a collection of "tit-n-bum" jokes, then look no further than Y Tu Mama Tambien ("And Your Mother Too"). Alfonso Cuaron (yes, the director signed up for Harry Potter 3) has managed to create a sexy road movie without a single cheerleader popping up in anyone's bed. Instead he brings together a strong cast of Spanish/Mexican actors--including the rising star Gael García Bernal and the enigmatic Maribel Verdú--with a heady mixture of dusty roads and raging hormones.
Leaving the poverty and grim reality of Amores Perros (the other hit Mexican movie of recent times, also starring Bernal) far behind, Y Tu Mama Tambien is set among the upper classes where two teenage friends, Julio and Tenoch, are left in a state of limbo when their girlfriends take a trip to Europe. But rather than resting on their laurels, they choose to chase a much bigger prize: Tenoch's cousin's wife, Luisa. When she takes up their offer to go on a trip to a mystical beach, the boys can't believe their luck; little do they know that Luisa is using them as a means to run away and forget. Here begins the boys' trip towards adulthood as they learn to control their hormones, jealousies and selfishness. Y Tu Mama Tambien's explicit scenes are more than mere titillation, just as the plot is more than a simple sex comedy. --Nikki Disney

Y Tu Mama Tambien [2001]