A non-lethal, low consequence virus that is spread by kissing and can pass through a condom would soon be endemic to society; and it did - we call it "herpes," or the "coldsore virus."
Many carry herpes, the coldsore virus, unknowingly. Some transfer it from their mouth to the genitals of their partner and then accuse them of having an affair, or stigmatising them for having the genital version of the coldsore. In this case, location is nothing, it's virus, virus, virus.
Whilst it may be unpleasant for the ninety percent of US adults to admit they have herpes, either as a coldsore on the mouth or on the genitals, it does serve as a great lesson in how stigmatisation feels.
Cold sores are herpes, they are the same virus regardless of if they are on the lips or down below. Indeed, you're more likely to get the virus from a kiss or oral sex than from sex. In excess of eighty percent of US adults have the virus, and it can be broken down into type 1 or type 2, but increasingly these distinctions are seen as pointless. Either one can infect either place. So, since the 20% without it are either not sexually active or in longterm relationships, pretty much all of the adult population who are dating carry the virus... and you can have it without symptoms, so many are unaware they have it. So, for a start, be careful, only be physical with a person you want to stay with for life. Second, even kids can have coldsores from a well intentioned kiss from an adult relative. So, whether you get coldsores or not, let's be a bit more grown up when it comes to the word "herpes" - it is the coldsore virus and the vast majority of adults have it.
The best way to be safe is to abstain until you feel that you have met "the one." Then in future generations nobody will have the coldsore virus or any other that is transmitted by kissing or sex. And if you do get it, it is fairly benign, maybe you'll only ever get one cold sore, maybe once a year... and if the "cold sore" is down below, you'll probably only get one in your lifetime. Added to that, medications take it away immediately anyway. So while it does stay for life, and prevention is the best option, the virus becomes dormant and your life goes on as normal.
Yeah, that's right, go ahead and stigmatise me for something so common that most doctors don't want to test for it. Nine times out of ten, statistically, the person pointing the "herpes" finger carries it too.
If you are out there playing Russian roulette with sexually transmitted disease, please at least have the decency not to sneer at those who catch viruses. It's akin to a bunch of people running across a road blindfolded and then scorning those that get injured or die. Unless you're going to have a truly responsible society that "takes off the blindfold" and "crosses with due caution," expect diseases to spread, to injure and cause death. Some, like herpes coldsores, are fairly benign, others like HIV can kill if left unmedicated. Sexual caution is sexy, so, "stop, look and listen" before you commit.