In modern society, people’s sexual behavior has become increasingly open with the development of society, in sexual life, many friends have chosen oral sex, can fully mobilize the passion of both sides, but we still have a certain worry, that in the end oral sex is harmful? If not throughout the correct use of condoms, oral sex can also be as dangerous. It doesn’t matter if it’s with the same sex or the opposite sex. The act of performing oral to penis or oral to vaginal is a dangerous sexual behavior and may transmit a variety of STDs, which is not desirable. Oral sex also involves contact with bodily fluids, i.e. contact with human bodily fluids with germs or viruses, including semen, vaginal secretions, blood, etc. In addition, if there is a wound on the mucous membrane of the mouth, there is also a risk of contracting STDs, but the infected body fluids are not saliva, but semen and vaginal secretions. The reason why oral sex is more likely than oral sex is because the bodily fluids of the other party that the helper comes into contact with are dangerous for transmission. Clinically, the most common problems associated with oral sex are: non-gonorrhea (mycoplasma, chlamydia, etc.), gonorrhea, herpes, condyloma acuminata, hepatitis, etc. In particular, we should remind you that: the type 1 herpes simplex (blisters at the corners of the mouth, mouth ulcers, etc.), which is prone to occur when people’s immunity is lowered in general, can be transmitted to each other’s vulva through oral sex, and the type 2 herpes virus, which is a sexually transmitted disease, may also be transferred to the mouth because of oral sex. Advice: If you must choose this mode of sex, please learn to protect yourself before this. Be careful of the disease from the “mouth” to enter!