This means that if the person who practices oral sex has any ulcer in the mouth, or some other factor that put them at risk, and the man with HIV ejaculates into the mouth, the risk of HIV transmission increases. How do you give a man oral sex? Viral load is the term used to describe the amount of HIV in a sample of body fluid. Do not let it sit in your mouth for long periods of time, as it might make its way through open sores or damaged tissue in the mouth. Oral sex involves using the mouth to stimulate the penis fellatio , vagina cunnilingus , or anus anilingus. They are likely to be highest around the time of menstruation having your period , when HIV-bearing cells shed from the cervix are most likely to be found in vaginal fluid, along with blood. You can start oral sex on a man whether his penis is erect or not. You probably will not get HIV from giving oral sex either—but having cuts or sores in your mouth, gum disease, having an STI in your throat, or recent dental work increases your risk. There is no transmission risks for receiving oral sex. Oral sex may not be risk-free, but it has been shown to be much less risky than the activities described above. In fact, knowing this, we can realize that, despite everything, HIV is a virus difficult to transmit, unlike others. This factsheet is due for review in November The presence of other sexually transmitted infections STIs on both persons. Therefore, you should not have to repeat the HIV test for the oral sex you got 4 weeks ago. However other STIs such as herpes , gonorrhoea and syphilis can still be passed on through oral sex. You can try licking, sucking, probing and nibbling gently — taking cues from your partner about what feels good to them. Allow at least an hour after any of these practices to let the wounds close themselves before you're exposed to semen or vaginal fluids.