It all comes down to the level of risk an individual wants to take and LUCK 
...
This is the one piece of genuine and useful wisdom here.
OP and the couple of entitled pricks advocating BB are so full of shit it would be unsurprising to discover they're scat eaters as part of their risk profile. Rationalising their luck by their (likely limited) adherence to an incomplete regimen that poses other medical risks is just masking their underlying intent to harm the women (and possibly men) they engage in sex with, and the community of interaction beyond.
The medical advice and research has been quoted and linked here many times before so here's an AI summary of one aspect that seems correct and more comprehensive but still not complete compared to Mr hardman's at top (credit he nods at Hep and HPV, but fails to address HSV and others):
[Asking Google about efficacy of the 3 primary antibiotics it suggested this likely question]
What is the most effective antibiotic for STI?
AI Overview
There isn't one "best" antibiotic for all STIs, as the right choice depends on the specific infection, drug resistance patterns, individual patient factors, and local health guidelines. Doxycycline and azithromycin are commonly used for chlamydia, while cephalosporins are often recommended for gonorrhea, but treatment regimens change due to evolving antibiotic resistance. Always consult a healthcare professional for an accurate diagnosis and a personalized treatment plan.
Commonly Used Antibiotics for Specific STIs
Chlamydia:
Doxycycline: Often considered highly effective.
Azithromycin: An alternative, particularly for those allergic or intolerant to doxycycline.
Gonorrhea:
Ceftriaxone: is a common treatment.
Doxycycline may be used for prevention (doxy-PEP) to prevent chlamydia and syphilis, but its effectiveness against gonorrhea is less consistent, and it is not a primary treatment for gonorrhea itself.
Syphilis:
Doxycycline: can be used for prevention.
Penicillin: is the traditional treatment for syphilis, but specific guidelines should be followed.
Factors Influencing Treatment Choice
Type of STI: Different bacteria require different antibiotics.
Antibiotic Resistance: Bacteria can become resistant to antibiotics, requiring changes in treatment guidelines.
Patient Allergies or Intolerances: Doxycycline is not suitable for everyone, for example, during pregnancy.
Pregnancy Status: Certain antibiotics are contraindicated in pregnancy.
Patient Population: Treatment recommendations can vary for different groups, such as cisgender women versus gay and bisexual men.
Prevention and Post-Exposure Prophylaxis (Doxy-PEP)
Doxy-PEP: Taking doxycycline after condomless sex can reduce the risk of chlamydia, syphilis, and to a lesser extent, gonorrhea.
Importance of Professional Guidance: While doxy-PEP shows promise for certain populations, its use and potential risks should be discussed with a healthcare provider.
Always Seek Professional Medical Advice
Accurate Diagnosis: Only a healthcare provider can correctly diagnose an STI.
Tailored Treatment: Antibiotic choice must be based on the specific infection and local guidelines, which are constantly updated due to resistance patterns. Now the smart people here will read all of that and hopefully also find bonafide medical expert advice (not least from the clinicians they visit regularly, with infection or not) that elaborates further about it and the risks and uncertainties involved. Suffice to say "Doxy" is NOT a certain treatment nor a comprehensive one and writing the rest of the risk off as an "oh you can (probably) get an easy no fuss treatment for the rest you catch" is despicably callous.
You may be lucky to be naturally resistant, (note this does not mean immune) such that you don't often catch or appear symptomatic but you can be very much transmissive. Women are far more at risk because infection rates as recipients is higher in the vagina. Sadly they may be "lucky" that symptoms may not be noticeable amongst the other issues they deal with down there so if they're not assiduous about checkups and treatment they may not know for weeks or ever whilst they are infectious and being affected. In the meantime their subsequent BB encounters...
I wonder how likely OP would make all the calls to his multitude of international conquests should he test positive, would he even know who to call or be able to contact them?
Unlike him I have been unlucky enough to catch several different stis over the many years past, and whilst most were with civvies I also bb'd a couple of SPs I was dating and one of them had an infection too. Making the call or telling partners in person is NOT something anyone with a smidge of compassion, sense of responsibility or shame would find easy or dismissable as to blow it off by dumping the flip "advice" at the top of this thread. Further consider that the women may have their own medical consequences as a result of a delayed or untreated infection with extremely serious potential consequences. To not treat that culpability, let alone responsibility, with the utmost gravitas seems at least sociopathic if not psychopathic to me.
Play safe preferably, do so with conscience and certainly review SP meetings. You may play safe (that time) but by degrees of association it's likely a known bber may've also dipped, so castigations aside, all should be entitled to take subsequent precautions to guard their sexual health and those whom they've since exposed. Threatening to not review in a pouting hissy fit because they got rightly called out further suggests a callous individual we and the SPs we visit would best do without. We have other bbers here who are more matter of fact, credible and less (self-)celebratory.
