"It's been a central plank of George Bush's social policy: to stop teenagers having sex. More than $1bn of federal money has been spent on promoting abstinence since 1998 - posters printed, television adverts broadcast and entire education programmes devised for hundreds of thousands of girls and boys.
The trouble is, new research suggests that it hasn't worked. At all."$1bn 'don't have sex' campaign a flop as research shows teenagers ignore lessons | Special reports | Guardian Unlimited