Currently, oral sex has become a very common sexual activity in the western world. In the realm of oral sex, there is always a nagging question lingering around people's mind, "Do I need to use a condom for oral sex?" The short answer is yes.
If you want to be protected against STIs (sexually transmitted infections), including HIV, syphilis, herpes, gonorrhea, HPV, trichomoniasis, and chlamydia, you should use condoms or dental dams during oral sex. Though it's a less risky sexual activity than PIV (penis-in-vagina) or anal sex, the STIs can still be transmitted through oral sex. Furthermore, having oral sex with people with any cuts around their mouth will increase the risk of infection, because most STIs are spread through bodily fluids. You'll be at risk if your mouth is exposed to vaginal fluids, semen, or precum.