The elementary forms of group sex -- What we talk about when we talk about orgies -- Becoming an orgiast: the social organization of group sex -- The primordial soup of desire: disgust, shame, and guilt -- From the Coolidge effect to cosmic ecstasy: group sex as arousal and transcendence -- Games people play: group sex as experimentation, adventure, and play -- Fear and bonding in Las Vegas and beyond: group sex as belonging, status, affirmation, and identity -- From revolutionaries to rock stars (and back again): group sex as rebellion, liberation and entertainment -- "Upping the ante" or over the edge? -- What are you doing after the orgy?