Hearing that stores like Target monitor their customers' spending habits to determine their future ones may not be much of a shock to most.
What may be more of one is that Target's department for Guest Marketing Analytics is so in tune with their consumers based on their spending, they can predict major changes in their lives.
They in fact do it so well, as the New York Times reports, that in one case they were able to predict a high school girl's pregnancy before her father did.