>STDs aren't a mystery, we know how to avoid them.
I never said it's a mystery. I'm saying that monogamy is much safer than nonmonogamy in terms of STD risk. These risks are not negligible. Look at how many people have herpes for example.
>I actually invited more strangers into my home back when I was monogamous, honestly, but I'm not sure what that has to do with polyamory.
You don't have to sleep with strangers to be poly, it is true. But I think most people who are in fact sleep with strangers and others who might profess to be poly yet secretly have a lot of jealousy.
>Monogamous people lose their partners all the time, have you seen the divorce rates?
They lose them less than poly people. That's the point.
>None of what you are suggesting matches my experience.
Since many of the downsides I've explained are in terms of relative risks, one instance of good luck does not disprove it. I also think it's common sense that having more partners makes life complicated and introduces more significant risks. Hell, even one partner can wreck your life. More than one, especially the type of people who partake in such deviant and risky behavior, is just asking for trouble.