okay. I mean the following respectfully, and am just commenting to give perspective from a more conservative lay Catholic standpoint. that said...
HIV/AIDS is an evil that has no connection to the personal sins of the vast majority of folks who suffer it. my heart breaks to think of the millions of men, women, and children who suffer unmentionable torments and ultimately die from this terrible disease. anyone with an ounce of compassion feels deep grief for their plight.
the RCC has lasted as long as it has by strongly emphasizing a set of absolute morals. the Church teaches that the use of artificial contraception (this includes condoms, hormone treatments, IUDs, diaphrams, spermicides, surgical sterilization, etc) is against the will of God for His people: it is the duty of married couples to be always open to receive God's Grace in the form of new life - children - except in extreme cases. procreation is the reason we are capable of having sex, and it is God's gift to us to make this duty a pleasurable one by making sex enjoyable. I would say, and I believe the Church would back me up on this, that a husband or wife being HIV-positive would qualify as an extreme case in which the couple would be exempt from the duty to bear children (as the wellbeing of the mother and child would be at severe risk). however, the Church recognizes only one way of preventing pregnancy - abstinence. in the case of sex for recreation between a husband and wife, one of which is HIV-positive, I would think it obvious that the only really safe way of preventing the other from being infected would be abstinence, and that the spirit of love should be enough to get a couple through that "lesser evil" in order to prevent the "greater evil" of simultaneous infection - which, if they already have children, would eventually orphan their children (to whom they have the utmost obligation) and probably impoverish and/or overburden their extended families. not to mention that human beings have it in their power to halt the spread of this terrible disease, by chosing the Godly route of abstinence.
it seems to me that if liberal laypersons and clergymen wanted to encourage the truly "lesser evil", they might consider encouraging masturbation to release sexual energy. though really, they ought to be focusing their attentions on encouraging prayer for and by the infected, and redirecting their guilt to the Western drug companies, cultures that encourage (by failing to discourage strongly enough) marital rape, sex slavers, etc.
the Church is not a government, nor a political policy machine that can (or should!) change with the tide of sentiment or science. the Church is Christ's body and consort, and She is responsible for the souls of all God's children. it is Her responsibility, therefore, to actively combat evil wherever she sees it, not to embrace any "lesser evil".
again, this isn't to say that it's not terrible what is happening to these people. but I think there's something more sinister, more pervasively evil, at work here than can be addressed by condoms. poverty, corruption, violence, subjication of women, etc, are not going to be addressed by condoms. condoms give the illusion of safety during sex between partners, when in reality they give an imperfect protection against a deadly and devastating disease. they also give the illusion, to policymakers and aid workers, that they are "addressing the problems" of Africa, Asia, inner-city America & Europe.
