You don't provide information about your partner, the setting, etc. But assuming you're in the US, Western Europe, or any industrialized country, it probably is unlikely she has HIV. Even among the most active female sex workers, in those settings on average well under one percent have HIV. The chance likely would be higher if you're, say, in south Asia or subtropical Africa, or if your partner were male (or M-to-F trans).

But even if she is HIV infected, I see nothing in your description that indicates significant risk of transmission. HIV is rarely if ever transmitted by saliva (which inactivates the virus, one reason kissing and oral sex are nearly zero risk); and assuming the dildo had not been in her rectum or vagina immeditely before in intered your rectum or mouth, that aspect also was risk free. I would not advise testing for HIV or any other STIs.

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

HHH, MD

Thank you.

I am in the UK. I don’t believe the dildo was inside her body, but just in case, I would like to know: If the dildo had been in her rectum or vagina immediately before I sucked it, would this change your assessment? I believe that even in this case, the risk would be no higher than giving oral sex to a male partner, which is a very low-risk event. Is this true?

I have one more question. I have a fetish. Can HIV be transmitted through panties, underwear, or clothes? If I lick and masturbate with panties that have fresh genital secretions (or blood that I might not notice) from others, should I be concerned about HIV transmission?

The completes the two follow-up exchanges included with each question and so ends this thread. I hope the discussion has been helpful. Best wishes and stay safe.