When HIV / AIDS first appeared in the US, it was mainly men who had sex with men who were affected. However, it is now clear that HIV is also spread through heterosexual relationships. Everyone, regardless of age, race, gender or sexual orientation, can become infected. However, the risk of contracting HIV / AIDS is greater if Make sex without protection. Use a new latex or polyurethane condoms every time you have sex. Anal sex is riskier than vaginal sex. The risk of HIV increases if you have many sexual partners. Have STI. Many sexually transmitted diseases cause open wounds in the genitals. These wounds serve as a door to HIV infection to enter your body. Use intravenous medications. People who take intravenous medications often share needles and syringes. It puts it on drops of blood from other people. Is an uncircumcised man. Studies indicate that lack of circumcision increases the risk of heterosexual HIV transmission.