Not surprisingly, research shows Bush’s abstinence-only initiative has no influence on any future decisions to have sex:

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.

A survey of more than 2,000 teenagers carried out by a research company on behalf of Congress found that the half of the sample given abstinence-only education displayed exactly the same predilection for sex as those who had received conventional sex education in which contraception was discussed.