The head of the penis has skin like this, and so do the labia, vagina, and rectum. The inside of the mouth and the throat have the same kind of skin.
So having oral sex can make this skin vulnerable to infection.
If your partner has HIV, you can reduce your risk from kind of sex, including oral sex, by taking medicines known as pre-exposure prophylaxis (Pr EP).
Not everyone needs Pr EP, but some benefit from it.
Oral sex refers to using the mouth to stimulate the penis (fellatio), the vagina (cunnilingus), or the anus (anilingus).
The risk of getting an STI from oral sex is a little different from the risk of vaginal sex, so let’s go over the details.
For a person giving oral sex, his or her risk may be greater when there are sores in the mouth or unhealthy gums.
For a person receiving oral sex, the risk may be greater if there are sores, cuts from shaving around his or her genitals, or another STI in the mix. You can reduce the risk of HIV transmission during oral sex if you avoid ejaculate in the mouth using a condom or withdrawal.
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