First off, I am a male. Recently, I visited a massage parlor and the session wound-up becoming sexual. 

Generally speaking I just want to know: Which STIs I could be at risk for in this situation and what are the chances of actually getting them from this one-time event.?

My masseuse was a woman and we did not have intercourse and did not have any type of oral sex, but she did rub her bare vagina and genital area on/against my penis (she used a lot of lube/massage oil/lotion during this process).

I didn't notice any visible irregularities on her but understand that may not mean much.

Can you lend some info here? 

Best,

This was a zero risk event, or very nearly so, for all STIs. Genital apposition without penetration in theory carries risk for the three STIs transmitted by skin contact, i.e. human papillomavirus (HPV) infection, herpes, and syphilis. For all three, the actual risk is exceedingly low. There are no tests for asymptomatic HPV, and in any case everyone gets or has genital HPV, and this would not have raised your risk above what it already has been from other sexual exposures in your past. Similarly, no tests for herpes simplex virus (HSV) are recommended or useful in this situation. Leaving only syphilis as a consideration for testing. It would be very rare in this situation, and if you got it, you could expect an obvious genital sore (a chancre) at the site of exposure. But if you would like the reassurance of a negative blood test, you could do that any time 6 weeks or more after the event.

If somehow I were in your situation, I wouldn't be at all worried. I would not get tested for anything, and I would continue unprotected sex with my wife with no fear of transmitting anything to her.

I hope this information is helpful. Let me know if anything isnt clear.

HHH, MD

One follow up here - even in the absence of penetration, what about any type of vaginal fluids/secretions from her making contact with the head/tip of my penis? Is that still no risk? For arguments sake, what if the head of my penis slipped inside of her for 5 seconds?

It’s only been a few days but I feel like I’ve been urinating a lot more and have very slight irritation at the tip of my penis. Perhaps I am being psycho-sematic..

I ‘m still going to get tested for peace of mind but your words have certainly been helpful. 

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