Call it rape, or call it sex: either way it still infects.
Seriously, I can’t believe this Pope right now. AIDS devastates more than just the people who die from it. It makes orphans and widows out of families, even faithful ones. It makes for an elderly population unable to support themselves because their children are dead. And if a woman has an infected, unfaithful husband, she could face an ultimatum: either have sex with him, knowing that he will die eventually and she is likely to follow suit, or refuse sex with him, and be effectively ostracized and unable to support herself or children.
Abraham Lincoln was willing to do whatever it took to preserve the Union: slavery or no slavery, slavery is a grave evil. He was even willing to take normally unconstitutional actions to save the Union from which came that Constitution, for “a life is never given wisely to save a limb.”
In the case of the AIDS epidemic, it ought to be clear that the goal of Christians should be to preserve life. And although the use contraception for the purpose of preventing new life is grave matter, condemning condoms in this un-normal situation is preserving a limb at the cost of so much life. You cannot save the Sanctity of sex if there are no Families, no Human life from which it arises and is given meaning.