Congratulations on using condoms for anal sex, regardless of being "a bit drunk". (Just a bit?) It transmuted a risky setting to low risk for HIV and all STDs. However, the "water test" was irrelevant to sexual safety. We always recommend against it. The existence of microscopic defects small enough to be invisible but large enough to permit transmission of viruses and fluids is an urban myth; even if you had seen a drop of water leak through, it would not have meant your exposure unprotected. If a condom doesn't break wide open, protection is complete. As for other exposures mentioned, unprotected oral sex risks gonorrhea, herpes, syphilis, and nongonococcal urethritis (NGU). The risks are low, but not trivial. Hand-genital contact, however, is truly zero risk, even if genital fluids or saliva is used for lubrication; the absence of known cases indicates that not enough fluids or infectious agents are carried to be a significant risk of infection. To the numbered questions in your initial post:

1) PrEP:  Discussed above.

2) HIV risk: Under one chance in thousands, maybe less than one in a million.

3) Other STDs are mentioned above. Absence of symptoms like urethral discharge, penile sores, oral sores, etc is good but not certain evidence you were not infected. You could have throat swab and urine testing for gonorrhea and a blood test for syphilis in 6 weeks.

4) See no. 3. I don't understand what the "hole" may be, but I doubt it makes any difference in risk.

5) Zero risk; see above.

Sorry again about the technical glitch. Let me know if anything isn't clear.

HHH, MD