However, the transmission risk for oral sex, especially HIV transmission, is significantly lower than for vaginal or anal sex.
Facesitting is a form of oral sex in which the receiver sits on the giver's face and pushes into it with his or her genitals.
Oral sex can also be performed by both partners at the same time in the so-called "sixty-nine" position.
The Centers for Disease Control and Prevention (CDC) stated in 2009: "Studies indicate that oral sex is commonly practiced by sexually active male-female and same-gender couples of various ages, including adolescents." Any sexual exchange of bodily fluids with a person infected with HIV, the virus that causes AIDS, poses a risk of infection.
Risk of STI infection, however, is generally considered significantly lower for oral sex than for vaginal or anal sex, with HIV transmission considered the lowest risk with regard to oral sex.
For conception to take place, sperm from the penis must enter the uterus and fallopian tubes and fertilize the female's egg.