HIV and STD screening should be tailored to the type of sexual activity. If you had a high-risk exposure, HIV screening is still recommended even though the STD screening was negative.
The chances of a person getting HIV via oral sex with a HIV positive partner is extremely low. The type of oral sex that may be the riskiest is mouth-to-penis oral sex, but with that in mind the risk is still very low and is much lower than with vaginal or anal sex.
There are also several factors that may increase your risk of getting HIV via oral sex, such as:
- Sores in the mouth or vagina or on the penis
- Bleeding gums
- oral contact with menstrual blood
- presence of other sexually transmitted diseases (STDs).
There is no risk of HIV when it comes to mutual masturbation.