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Carrie (Sarah Jessica Parker) discovers some surprising facts about Mr. Big (Chris Noth) -- he's been married before, his ex is attractive, intelligent, and successful, and they used to enjoy the occasional ménage à trois. As coincidence would have it, Samantha (Kim Cattrall) becomes involved with a married man who would like her to join him and his wife for a threesome, and Charlotte (Kristin Davis) learns that her new boyfriend is also interested in being with two women at once. Miranda (Cynthia Nixon) is depressed that her love life is not nearly so eventful as that of her friends, and becomes obsessed with her appearance.