The development of your argument would have us believe that legislating against sodomy would lower the transmission of AIDS, and consequently, reduce the medical cost to society. I would suggest that laws against sodomy would have virtually no effect on the incidence of those acts, and that said transmission would not diminish one whit.
What WOULD happen is that police would be empowered to kick in peoples' bedroom doors and haul them off to the jug because they were engaged in a sexual activity as old as Man.
The cost is obvious; the benefit dubious.
In addtion, your argument is grounded in the notion that socity has the right to regulate any activity that may adversely affect the collective wellbeing. Where does THAT power end? If the cops can spy on my bedroom, can't they also spy on my kitchen? My garage? My bathroom? Do you really want to live in such a world?
By the way, you might try making your point with a little less vitriol and a little more substance.
Well, let's repeal the laws against mutual affray, too, okay? If two people want to beat each other into a bloody pulp, what business is it of ours? We sure don't want to be seen imposing some "morality" on people who beat each other senseless. We certainly don't want to have "bedroom police" peering in and disturbing us as we kick, gouge, and gnaw on each other. Let's just have SCOTUS turn the entire nation into a Las Vegas boxing ring. Why stop at injury? Let's not even prosecute it if death results. Consent uber alles.
Sodomy is really a special kind of mutual assault and battery. That is ALL it is.