As advertised, there's a whole lotta sex in John Cameron Mitchell's Shortbus. Men with men, women with women, women with men and all possible multiplications and permutations thereof. Which really shouldn't be surprising, since the film is quite aggressively about sex. Unlike the great majority of cinematic sex scenes -- most of which are blocked and scored so carefully that they're more like choreographed, showy dances than anything else -- those in Shortbus are no mere window dressing, and nor are they present as excuses to get pretty people to take their clothes off (and then be artfully covered by that old Hollywood favorite, the L-shaped sheet). Instead, they're crucial to the plot, and to the development of the characters in the film. And they're also a whole lot of fun, much of the time. Mitchell and his cast very successfully avoid both the falseness of mainstream sex scenes and the bow-chick-a-bow-bow absurdity of straight-up porn, arriving instead in a place of realism, where actual people have actual sex. Sweaty, awkward, joyous, sad sex that's not always either pretty or sexy.