Misconception 1 – As long as you use a condom, you will not be infected with STDs. Although condoms are the best way to prevent STDs, they are not foolproof. If a condom is used improperly (e.g., not fully inserted, used halfway through intercourse, continued sexual activity after ejaculation, etc.) or if the condom is of poor quality and breaks in the middle of intercourse, there is still a chance of contracting an STD. Misconception 2 – Taking vitamin C before sex can prevent STDs. Correct – Vitamin C is not useful for preventing STDs. Misconception #3 – Putting gasoline in the urethra can cure UTIs. Correct – Gasoline has no antiseptic function, but can damage the mucous membrane of the urethra and cause serious tissue reactions. Misconception 4 – You can’t get an STD if you urinate immediately after having unclean sex. Correct – Bacteria or viruses that cause STDs can penetrate deep into the tissues or enter the bloodstream in a short period of time, so urinating immediately after intercourse has a limited effect on preventing STDs. However, female patients can prevent acute cystitis by urinating after sexual intercourse to empty the bladder of bacteria. Misconception #5 – If you take antibiotics before unclean intercourse, you don’t have to wear a condom. Correct – Antibiotics are only effective for STDs caused by bacteria, but not for vesicles or AIDS. Misuse of antibiotics can make bacteria resistant to them. Gonorrhea is the most obvious example. Misconception #6 – You can tell if a woman has an STD by her appearance. Correct – Many STDs in women have no obvious symptoms, and the appearance of the lesion is not visible, or the lesion is deep in the cervix, so it is not easy to detect, so women are often carriers of STDs without knowing it. The wrong idea is that only people with poor health can get STDs. The right – STDs are everywhere, and people who are physically fit as cattle can still get STDs. Misconception 8 – Oral sex is not a way to catch STDs. Correct – Oral sex is one of the most important ways of STD transmission. Vesicles, gonorrhea, syphilis, non-gonococcal urethritis and AIDS can be contracted through oral sex. Incorrect – Only gay men can get AIDS. Correct – AIDS does not only happen to homosexual men, but also to heterosexual men, mothers and fetuses, and couples. Misconception 10 – As long as there are no symptoms, STDs do not need to be treated. Correct – There is a certain course of treatment for STDs, and you should not stop taking medication just because there are no symptoms. Incorrect – Blood from blood donation centers is perfectly safe and there is no need to worry about contracting STDs. Correct – There is a so-called window period for HIV infection and there is no effective method to test for it. (Therefore, although blood from blood donation centers is screened for syphilis and HIV, there is no guarantee that it is absolutely safe. Incorrect – As long as you don’t get involved in inappropriate places, you won’t get STDs. Correct – Vesicles and warts can often be contracted without sexual intercourse, and blood transfusions and sharing syringes with STD carriers can lead to infection with STD syphilis and AIDS. The wrong idea – if you get an STD, you don’t need to treat it if your partner has no symptoms. Correct – When you get an STD, your partner must be tested and treated at the same time to avoid ping-pong infection. Misconception 14 – STDs only show symptoms in the sexual organs. Correct – In addition to the genitalia, symptoms of STDs may appear in other organs of the body, including the skin, mouth, eyes, rectum, near the anus, and joints.