Natalie Portman and Ashton Kutcher have a non-binding sexual relationship, which of course can't last.

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Emma and Adam have known each other since camp, and their paths keep crossing. One day the two attractive young people decide to have sex together without having to deal with a real relationship. They sleep together all the time, but refuse to do the romance or snuggling that usually comes with that level of closeness.

This romantic comedy by Ivan Reitman (Ghostbusters, Kindergarten Cop) offers an unimaginative mix of been-there-done-that genre clichés (an indecisive couple, a chaotic extended family, faithful friends and a wedding), and is entertaining thanks only to energetic direction and charming stars.