er.. stoppable.
Don't have sex with anybody until you marry. Marry a virgin (or at least someone who's tested clean.) Then have sex only with your spouse, period.
That's the only was to be double-dog sure you won't be culled out of the human race by one of these loathsome diseases.
And it provides yet another incentive, if you need one, to cultivate true and lasting love, and not just be "a sot and thrall of lust"--- as the poet says.
I just love overly-simplistic generalizations!
A major problem reported in Europe (and certainly coming to America), is the victims of ROP-Rapists (male and female victims) are being infected with all manner of STD's and possibly with HIV, as well.
Reportedly, the Muslim "Immigrants" are rife with all sorts of transmissible diseases.
So avoiding "Casual Sex", marrying a virgin (especially if you are a 60-year-old widower looking to remarry), and other such ideas aren't exactly bullet-proof.
Plus, if you are male, you could marry a nice girl who has returned from a year in a third-world country as a missionary, or a Peace Corps volunteer, or Red Cross volunteer, etc; I believe they only get raped by the locals about six times per tour of duty. And they are admonished by their organizations to not talk about the victimization, because it would make it harder to recruit new volunteers. Gee - ya think?
Rape. That's a problem. What are you gonna do about that? Especially when the government covers it up?