A genuine rarity: a sex comedy with brains. Even rarer, one with smart politics—so unobtrusive you may not notice—and wonderful acting. Writer-director Alfonso Cuaron went back to his native Mexico to put together this 2001 road movie about two 17-year-old boys from Mexico City, one privileged, the other working-class. On an impulse, they take off for a remote coastal beach with a 28-year-old married woman. It's not difficult to understand why this movie was a smash success in Mexico, especially with teenagers; few films deal with teenage hormones, Latin machismo, and the complexities of friendship in such a refreshing way. The movie keeps surprising you and stays with you long after it's over. With Diego Luna, Gael Garcia Bernal, and Maribel Verdu. In Spanish with subtitles.