Unsafe sex is generally for infectious diseases like AIDS. It can be transmitted through sexual intercourse, and there are some sexual practices that are not so safe. These sexual acts can contain an exchange of body fluids in high HIV concentrations, which are generally genital tract secretions. If the exchange of body fluids is only saliva in the mouth, it will not cause HIV transmission, but only if blood or genital secretions are seen. If a condom is worn during sex, and if it is worn throughout, there is no exchange of genital secretions, and in this case it is a safe sex act. All sexual behaviors that may lead to HIV transmission are called unsafe sex. In this case, there is usually an exchange of blood, reproductive tract secretions or breast milk.