For starters, does he realize that married women (men too!) use birth control? The impression that Santorum finds the prevalent practice of birth control harmful to women is, frankly, mind-numbing. If he meant to focus on teen sexual promiscuity, he surely could have, and thereby might have sounded less out of touch.
Now, he qualifies his religious views by saying he doesnt vote against contraception because its not the taking of a human life (in other contexts he has emphasized that as a legal matter he has no problem with contraception). But how does that square with his professed belief that a candidates values are essential to understanding and predicting his behavior? Perhaps thats an abortion-only rule. (And really, where are George Stephanopouloss questions on this topic when you need them?)
In any event, this sort of thing undermines Santorums electability argument. (Current polling match-ups between President Obama and each of the two frontrunners, before the GOP has a nominee and before Santorums record is out there, are virtually useless.) This is how, in part, he lost Pennsylvania by appearing extreme and schoolmarmish, too far to the right of average voters in a purple state. If he is the nominee in 2012, he might get some blue-collar fellows, but what about those women in Ohio, Pennsylvania, etc.? And what about more secularized suburban communities? Fuggedaboutit.