I reviewed your previous discussion and agree with Dr. Hook's evaluation and advice. I suggest you re-read that thread, which largely answers your questions this time. The main aspect of your first bathhouse experience that carried any potential infection risk was the oral sex, i.e. oral contact with your penis. You are correct that the chance of catching HIV from such exposures is zero for all practical purposes:  no such HIV transmission have ever been documented, which doesn't mean it cannot happen, but the chance is extremely low. Gonorrhea is the most significant risk, although there also are small risks for herpes, syphilis and nongonococcal urethritis. 

Kissing other men also is not entirely risk free. Oral gonorrhea sometimes is acquired by kissing, and syphilis also is a low but not insignificant risk.

While avoiding anal sex or performing oral sex with other men in the future would reduce your risk, I strongly advise you not to underestimate the likelihood you will give in to temptation and have such exposures in the future. Although some MSM have limited sexual practices -- e.g. insertive but not receptive anal sex, no anal sex at all, etc -- in fact many (most?) men in your situation ultimately engage in all such practices. You should carefully consider your options to maximize safety before you have any future sexual exposures of any kind. Have condoms handy and use them for anal sex (either giving or receiving). Was you suggest yourself, PrEP might make sense, and for sure should be your plan in the event you in fact start having anal sex. Also look into taking doxycycline after certain sexual exposures (Doxy-PEP), which is a recent innovation to prevent syphilis, chlamydia and (to some extent) gonorrhea in men having sex with other men. Your local health department probably is a good source for advice and perhaps appropriate prescriptions.

In the next couple of weeks, be on the alert for symptoms like penile discharge or sores and painful urination, but I would suggest testing is optional if none of these develop. However, if you would like the reassurance of testing, of course you can do that -- in which case have a gonorrhea/chlamydia tests on urine and a throat swab, and blood tests for HIV and syphilis after 6 weeks. However, over the long run I encourage you to not depend on testing for HIV and other STDs after any single exposure or bathhouse visit. A smarter approach for most sexually active MSM is to test periodically (anywhere from every 3 to 12 months, depending on frequency of such activities), and not after each event. Whatever testing strategy you select, with rare exception it should only be tests for gonorrhea and chlamydia at exposed sites and blood tests only for HIV, syphilis and maybe (but not always) hepatitis B or C; for the most part don't get sucked into "comprehensive" test panels that include such tests as herpes, CMV, EBV and HTLV. Your local health department (and perhaps your personal physician) also can provide advice on this aspect of sexual safety.

I hope these comments are helpful. Let me know if anything isn't clear.

HHH, MD