US teens, young adults 'doing it' less, study says

Fewer teens and young adults are having sex, a government survey shows, and theories abound for why they're doing it less. Experts say this generation may be more cautious than their predecessors, more aware of sexually spread diseases. Or perhaps emphasis on abstinence in the past decade has had some influence. Or maybe they're just too busy."It's not even on my radar," said 17-year-old Abbey