Safer sex is not just about reducing the risk of pregnancy. Although two people with penises, or two people with uteruses having sex do not have to be concerned about pregnancy, there is still a risk for STIs and HIV. Condoms and dental dams are used to cover the penis, anus or genitals for anal, oral or hand sex. Use a condom or a dental dam every time you have sex (anal, oral, vaginal, hand) to lower your risk of STIs and HIV.