It is possible to become infected with HIV through oral sex, however the risk of becoming infected with HIV through unprotected oral sex is lower than that of unprotected anal or vaginal sex. The risk of HIV transmission for unprotected oral sex increases

1. if the person performing oral sex has bleeding gums, ulcers, gum disease, cuts or sores around or in their mouth or throat;
2. if the person receiving oral sex ejaculates in the mouth of the person performing oral sex; or
3. if the person receiving oral sex has another sexually transmitted disease (STD)
4. ecent tooth-brushing which may cause some minor gum bleeding.