Theoretically, there is a very low risk of HIV transmission from oral sex, and a high risk is seen mainly in the following situations: i. Oral sex that occurs between men who have sex with men and is unprotected. Second, the passive party of oral sex is HIV-infected and the active party of oral sex (male and female) has bleeding gums and large oral ulcers. If the passive party of oral sex ejaculates in the mouth of the active party, it greatly increases the infection rate. In addition to this, oral sex does not easily transmit HIV, but oral sex can easily transmit other diseases. Such as gonorrhea, herpes virus infection, EBV infection, oral warts, etc.