Swingers: Inside the Secret World of Provocative Parties and Couples Who 'Swap'

Swingers, like polyester leisure suits, seemed to have their heyday in the '70s. But couples who openly swap partners for a night of passionate sex with strangers, are becoming a growing trend in a sort of new sexual relationship revolution -- and those who swing say the rest of us monogamists are missing out. "Nightline" went inside the top secret world of swingers -- as guests, not participants -- to a highly provocative masquerade party at a hotel in New York City hosted by a group called...Full Story