Wanting to avoid the attendant emotional muddle of an actual relationship, Emma proposes a mutual-use physical relationship

A nice sense of comedic background detail and the winning chemistry of stars Natalie Portman and Ashton Kutcher power No Strings Attached, a comedy in which two young adults test a pact to avoid any deeper feelings while enjoying each other’s company purely for sex. Bantamweight but fun throughout, the movie connects consistently, both on personality and scene-to-scene joke-writing.

It remains to be seen whether No Strings Attached will benefit from a Black Swan �bump,� which just this weekend added another 740 screens, or whether Stateside audiences will suffer some degree of performer fatigue from being presented such a wildly divergent portrait of Portman, and her Golden Globe-winning turn in that film.