This blunt sex comedy is most compelling when Jamie Foxx, Vivica Fox, Tamala Jones, and Tommy Davidson go at one another--grouping and regrouping as two heterosexual couples and two pairs of same-sex friends. There are moments of high hilarity in the slapstick that results when the characters attempt to minimize mucus-membrane contact during sex. But the intensity among the leads evaporates over the course of a long sequence full of extras they have incidental interactions with; given a script by Takashi Bufford and Bootsie that's a hard-to-swallow combination of safe-sex propaganda and expansive lewdness, director Jeff Pollack can't afford to lose laughs for that long.