One day ago since this question posted, I sucked a 20 years old gay man's penis for 3-4 seconds and immediately spat since I didn't like it. I am not sure if there was any precum or semen while I sucked but the penis seemed dry before I put it in my mouth and I didn't put his entire penis in my mouth. After that, I kissed that man passionately with tongue.
I met the man on dating app who says he is HIV negative and in past only had protected anal sex with men but has not gone through any HIV tests since he felt he wasn't needed same.
I'm virgin and have no prior sex experience. Now I'm scared of getting HIV virus. Can you please help me? What shall I do? Many thanks in advance.
Thank you for your inquiry. From what we gather from the question, you were asking about acquiring HIV from unprotected oral sex. From the information given, this scenario is determined to be low risk. (Evidence of transmission occurs through these activities when certain conditions are met). For HIV transmission to occur, specific HIV+ fluids (eg. semen, pre-cum, blood) must come into direct contact with the blood stream of an HIV- person. Although the risk of HIV transmission through oral sex is low, several factors such as open sores in the mouth or on the penis and bleeding gums may increase the risk of HIV transmission. 
Recommendation: Refer to Physician for HIV test
Regards, AIDS Vancouver Helpline/Online, Ashley
- Centers for Disease Control and Prevention. Oral Sex and HIV Risk. [Internet] . 2018 [cited September 5, 2018] Available from: https://www.cdc.gov/hiv/risk/oralsex.html