I'm telling you, it's the ****ing.....err....diamond miners?
Some kinda manual labour industrial types anyways. On Friday, after work, they all head straight into town with their wages and blow it all on booze and condomless hookers.
And then there's the polygamy thing. You get one guy with 8 wives, he ****s a hooker, gets AIDS and gives it to all his wives. Then one of them cheats on him, another guy gets AIDS and HIS 8 wives all get AIDS too.
So where in a monogamous society you'd only have two guys, one woman and a hooker with AIDS, in a polygamous society you get two guys, maybe a dozen women and a hooker with AIDS.
And with 8 wives, the chances of one of them cheating is increased 8-fold.