Weird...I was just reminiscing over my uncle's stupidity on this very topic. Got into it with him during our Christmas visit...couldn't help it, he just outright said that girls under 18 shouldn't be allowed to have Plan B (or as he called it, "that damn abortion pill") and that no woman should ever have an abortion unless the pregnancy's a product of rape or incest.
Which reminds me-- WHY is incest always referred to separately from rape? If your dad rapes you, that's rape, right? So why call it incest?
Because the fact that it is also incestuous adds another level of psychological trauma, on top of the rape-trauma. You're supposed to be able to trust your family members, even when you can't trust anyone else. Rape is about the most serious breach of trust there is.
That makes some sense, I suppose; emotionally, I don't have much experience in "family can and should be trusted over anyone else", but I do know that I should've been able to trust my family and feel secure with them.
...but it still seems like a strange thing to say, though. Rape is rape is rape; it being incestuous rape would be one more horrible thing, but it's still rape, and if you're going to say "it's only okay if it was rape or incest" why are you even thinking about people raping their relatives as opposed to it being a family friend, a stranger, etc.? In other words, if you're going to be THAT specific, why not say "rape, incestuous rape, date rape, acquaintance rape, stranger rape, etc."?