I believe that Aids started with human males having sex with infected primates. There--I said it!
It could be that, OR it could be the butchering process. Apparently the green monkey is eaten in that part of the world, and if you've ever butchered something you know it's a bloody affair. If you also cut yourself, or have an opening in the skin, I believe you could contract it that way.
Of course, who really knows? ;)
susie
Well, there aren't any sheep around in Africa, so, well, those Brokeback Mountain types, well, you know.