HIV is spread during vaginal sex when HIV-infected semen, vaginal luid, or menstrual blood comes into contact with the mucous membranes of the vagina or penis. In general, since there is more mucous membrane area in the vagina, and a greater possibility of small cuts in the vagina, women are more likely than men to get infected with HIV through unprotected vaginal sex. Teenagers and women entering menopause are at especially high risk for getting HIV (and other sexually transmitted diseases) because the tissue lining the vagina is more fragile at these ages. Cuts or sores on the penis or vagina raise the risk of HIV infection during vaginal sex for both men and women. Using a male latex condom or a female condom lowers your risk of getting HIV through vaginal sex