"The take-home message [apparent from various statistics] is clear: hold on to your virginity at least till after you leave school. In the twenty-first century, you may no longer owe it to your religion or your future husband to be sexually responsible, but you certainly owe it to your career."
But, he adds, "Nothing in the correlation justifies such a conclusion. ... A woman who concludes that being sexually choosier than she naturally wants to be will improve her chances of making the alpha track is making the same statistical error as a man who thinks that drinking more dry martinis will make him richer."
Hang on a minute. Having sex, by and large, increases your chances of having a baby. Having a baby before you leave school, by and large, hinders your pursuit of a successful career. No one is making a statistical errors by thinking along these lines.