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This Argentinean sex comedy is a lighthearted romp for most of its running time, although it takes a turn toward the serious in its final stretch. Diego (Adrián Suar), an award-winning egotistical doctor, and his humbler low-key research partner, Richard (Juan Minujín), are longtime best friends. So are their wives: Diego's Emilia (Julieta Díaz) is a TV meteorologist and mom, and Richard's Betina (Carla Peterson) works in fashion. All are attractive people in their late 30s who they think they know each other well until Betina confesses that she and Richard have been keeping their marriage alive for years as secret swingers, attending orgies with like-minded couples. An intrigued Emilia begins pressing an inhibited Diego to take her to one of this community's parties, but once they actually go, he puts on a hilarious display of jittery, moral resistance. Days later, under even more pressure from Richard and Betina, as well as Emilia, Diego stops putting up a fight and the couples change partners. Despite some comically awkward moments (Diego and Emilia's teenage son shows up unexpectedly the morning after a night of four-way romping), everything seems fine. But eventually emotions are aroused that trump desire, leading to a crossfire of love, betrayal, and anger that upsets the illusion of free-spiritedness. While the story loses some of its spark towards the end, the appealing cast and strong characters compensate in director Diego Kaplan's stylish film. Recommended. (T. Keogh)