A STI is passed from one person to another when having oral, vaginal or anal sex. Examples of STIs are chlamydia, gonorrhea, syphilis, HIV, hepatitis B, and trichomonasis (commonly called Trich).
A STI is passed from one person to another when having oral, vaginal or anal sex. Examples of STIs are chlamydia, gonorrhea, syphilis, HIV, hepatitis B, and trichomonasis (commonly called Trich).