This "legitimate rape" story is awesome on a number of levels.
First, the term "legitimate rape," ie being grabbed and beaten by a stranger, as opposed to merely being forced by a guy with a legitimate claim to your snatch because he bought you dinner or whatever. This is Republican Man in the real, living flesh - you can see him in Kiwiblog's comments threads any day of the week.
Second, the opportunity for collateral damage to VP candidate Ryan. Romney and Ryan don't want to be tarred with this "Republican Man" brush, but Ryan's a fan of legislating for the rape of abortion-seeking women using an ultrasound wand - he hasn't a shit's show of avoiding being tainted by this.
Third, Republican Science in all its glory. You don't get pregnant from rape, because... er, women's stuff.