Time for the physician to check in here.
The correct replies are all listed above.
To summarize:
Those small abrasions most certainly do put you at risk of HIV infection.
You should be HIV tested now, and most certainly again in 6 months.
It is unlikely you will test positive at this time, unless you were infected several weeks before this incident, in which case YOU most certainly could infect that rude guy who bottomed you.
If HE has just infected you, the likelihood of your NOT testing positive in 6 months is slim.
The cells of the rectum have receptors for the HIV virus. If they are exposed to HIV, the virus likes to stick to them, leading to infection. Those sticky cells are not present in the mouth, so oral contact with semen is much less likely to result in infection than anal contact. By the same token, if there is a concentratation of HIV virus in the guy's rectum, and you rub a denuded chunk of skin against the viral laden tissue, the virus can rub off, find the same langerhan cell in your uninfected penile skin, and bingo, we add another HIV positive guy to the list.
Now, how MANY viral particles does it take to infect under these ideal conditions? We don't know. It could be only one, and they are small buggers, it could be 10,000,000. We don't know.
Because of the uncertainty involved, and the fact that statistics only are meaningful for large groups,and you are an individual, we can't give you a simple yes or no type of answer. Get tested now, get tested again in 6 months.
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