Emma (Natalie Portman) is a frosty hospital resident, while Adam (Ashton Kutcher) assists behind the camera of a Glee
-ish TV show. These acquaintances arrange to have sex-only dates, thus avoiding emotional entanglements. Last year, we were besieged by a spate of sperm-donor rom-coms, and now comes the dawn of the hook-up romance. Portman (who also produced) and Kutcher bring considerable energy to this slight concept, but it bogs down in genre cliché. I worry that younger moviegoers have no cinematic model for meaningful relationships, and this film proposes an appalling one. Screen romance should be a tad more aspirational, although Adam sensitively provides a box of cupcakes at a crucial juncture in one of the film's best scenes. Director Ivan Reitman (Ghostbusters
) knows comedy, and there are laughs as well as funny people (Kevin Kline, Ludacris, Abby Elliot et al., all wasted), but kowtowing to formula sabotages the lead couple's mojo.