A movie about fuck buddies that's squeamish about the term — it isn't only in the TV commercial that Ashton Kutcher says "sex friends" — isn't just sanitized, it's sad. In director Ivan "Jason's dad" Reitman's superficial farce, Emma (Natalie Portman) is a resident at an LA hospital who has a crazy schedule and a skeptical view of love. A casual hook-up with Adam (Kutcher), a TV writer whose girlfriend left him for his actor father, leads her to propose they use each other for sex, NSA. They agree to split as soon as either takes the relationship seriously. Since this is a comedy, the guy is the one who longs for hand holding and cuddling. It's a good premise, but Reitman and screenwriter Elizabeth Meriwether do little aside from ape Judd Apatow movies. Kutcher and Portman don't have any Gyllenhaal-Hathaway sizzle, so the movie is unsexy as well as unfunny. But Kevin Kline is a hoot as Adam's wistfully profligate father.