I have two questions to consult you. A few days ago, I made an appointment with a prostitute online. At the beginning, after she took a bath, she insisted on doing oral sex without a condom, which I felt was risky, so I didn't let her do it. We didn't have sexual intercourse. She directly licked my nipples and then gave me a hand job. Later, because I didn't ejaculate during the hand job, I ejaculated through nipple sex. Afterward, I noticed that there were many red scratch marks on her breasts, and upon closer inspection, there were several small blisters on her breasts. She said they were caused by mosquito bites, but they didn't look like it. Now I'm worried that the blisters on her breasts might have broken and secreted pus, which might have come into prolonged contact with my penis. Also, during the hand job, she touched her breasts and seemed to have touched her vagina. Should I take a post-exposure prophylaxis (PEP) drug? Because she insisted on doing oral sex without a condom, it seems like there might be a problem.

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Dear Doctor, I'm in China. At that time, I was worried and consulted a relatively well-known doctor online. He said that there was a risk of infection if the secretions from the blisters on the girl's breasts, where the skin was broken, came into prolonged contact with the penis. He advised me to take a blocking drug. Later, I went to the hospital for a check-up and another doctor said there was no risk of infection and I didn't need to take the drug. But now I have itchy skin from time to time, and I'm quite worried. After much thought, I decided to consult you. Doctor, there's another detail I'd like to ask about. The second girl, when she was giving me a hand job, first licked one of my nipples, then while licking the other nipple, she kept touching the one she had just licked with her hand, and then used that hand to give me a hand job. I'm wondering if there's a risk, as there was a lot of her saliva on that hand.

I knew where you are. Still, I disagree strongly with your the "well known" online doctor. The second hospital doctor probably is right. "Itchy skin" is not a symptom of any STI. I don't care if the "second girl" licked your nipper; such contact never transmits STI. You will never get any STI without intercourse:  if your penis does not enter another person's vagina, rectum or mouth, you will never been infected. And saliva does not transmit STIs.---

OK doctor, if you say so, I'll feel relieved. Thank you! Otherwise, I might have been too scared. Then, will we still need to go to the hospital for HIV and syphilis tests at that time?

You do not need to go to any hospital. You do not need testing. Of course you are free to be tested if you feel you need the reassurance of the negative results. That might be your decision, but it is not my advice.---