I hate to say it, but celibacy has never been widely practiced and probably never will be.
STDs would not have evolved without the human behavior that facilitates their spread.
That said, people should make some effort to protect themselves against those diseases. Clearly, those tweeters are not concerned right now whether they get those diseases, because they believe that they can be cured with a round of antibiotics or antivirals.
But antibiotic resistant bacteria are spreading. And some of those bacteria are very adept at evading the immune system, so that once you get them, if you cannot eradicate them with antibiotics, you are stuck with the infection forever. Gonorrhea can cause sterility, and can have devastating effect if passed to a newborn during the birth process. (It is for this reason that newborn infants are always presented to their mothers with puffy eyes—that’s from the eye ointment used to prevent ophthalmic gonorrhea.) Syphilis eventually affects the brain and skeletal system. Etc.
And antivirals do not actually get rid of viruses. The viruses hide inside cells, often out of sight of the immune system and out of reach of antivirals. The best an antiviral can do is mitigate symptoms while the immune system controls the active infection. Some viruses, like the papilloma that causes many cancers, actually insert their DNA into the human DNA, thus becoming a permanent part of cells.
Sure, they can brag about getting STDs, and maybe they think it decreases the stigma of getting those diseases. But it would be better to brag about being careful and avoiding those diseases in the first place.
It’s not just viruses. Our bacteria own us. There is more of them in us than us. A healthy life with good food, soil, environment, love can be the difference between your good health and everything else: cancer, depression, auto-immune, etc. who you share food, spit, hugs, yes, sex organs with makes a difference in your bacterial biome. Young people can endure mass bad bacterial exposure, for a short while. At 20 maybe one can have a weekend with 5 sex partners, eat pizza left out since yesterday and undercooked burgers. At 40, maybe not. That stuff starts to influence your overall health.
The more you learn about what the wrong bacteria can do to your life, the less you get excited about a rock star life with groupies in every town.
Yah. But a generation ago, when people committed fornication (P-in-V, not just mutual masturbation to keep the guy from getting too pushy..., it was generally with the person they ended up marrying anyway.