A sketch-comedy movie about the joys and embarrassments of teen sex. But mostly the embarrassments.

Raunchy as they come, "Extreme Movie", especially in its unrated edition, is a sex perversion comedy with a teen accent. The clever and original premise finds a number of high-school students taking a sex-education class taught by an over-friendly teacher trying to make kids comfortable about an uncomfortable subject. Each students has his or her own take on early sexual experiences, making "Extreme Movie" a bundle of sketches starring a few familiar faces. Frank Muniz ("Malcolm in the Middle") begins the comedy as a lucky guy who talks his girlfriend into going all the way, then finds there's no limit to her fetishistic cravings. Michael Cera ("Superbad") plays a computer nerd who meets a hot girl online and sets up a meeting with her, but ends up in the wrong place, accidentally terrifying a middle-aged woman who beats him with a broom. Other bits involve sex with Abraham Lincoln, sex with a Muppet-like character, and the travails of a horny teen (Ryan Pinkston) whose shyness is tested when he accidentally ends up in a porn movie production. Matthew Lillard plays himself dispensing crude advice to guys everywhere.