Your previous two questions and this one all suggest you overestimate the risks of STI. Even after entirely unprotected sex with a female partner -- including sex workers -- the large majority of exposure do not result in STIs. With the condom breakage, your risk was a little higher than it would have been, but protection is considered complete when the head of the penis and the urethra (penile opening) are covered. And you describe a partner who is aware of STDs and unlikely to be infected. I would not advise testing for anything on account of this single event. Rather than testing after any single sexual exposure, a smarter plan is to get tested periodically -- maybe after 6-7 such events, but not every time.

I hope this information is helpful. Let me know if anything isn't clear.

HHH, MD

I was told that time matters during exposure to genital secretions, so if the exposure was short like lasted for  seconds or few minutes the risk is very low and I shouldn’t worry about it. Do you agree with this even if the penis was uncovered? 

All that said, testing can have reassurance value even when the risk is zero. If that applies to you, consider an AgAb (4th generation, "combo") blood test and a syphilis blood test 6 weeks after the event. A urine gonorrhea/chlamydia test can be done any time 4-5 days or more after exposure. If somehow I were in your situation, I wouldn't be tested for anything and would be continuing unprotected sex with my wife without worry.

That concludes this thread. I hope the discussion has been helpful.