It should be said that condoms are an easy to use and worth promoting male contraceptive tool. According to statistics, if condoms are used correctly, the failure rate is only 1.5 to 4.2%. However, in the actual use of condoms, the failure rate is as high as 10-15%. In recent years, the use of condoms has become more common because of their dual effectiveness in contraception and prevention of sexually transmitted diseases, especially because of the widespread AIDS epidemic. It should be said that the condom is an easy-to-use and popular male contraceptive tool. According to statistics, if condoms are used correctly, the failure rate is only 1.5 to 4.2%. However, in the actual use of condoms, the failure rate is as high as 10-15%. The reason for this is that people fail to pay attention to the smallest details in the process of using condoms, resulting in contraceptive failure. Here are five common reasons: 1, wear condoms carelessly. Generally speaking, wearing condoms is often in the pre-frolic stage of flirting and arousing sexual desire. When wearing a condom. Fingernails or rings unintentionally scratched the condom, resulting in ultra-thin condom failure. 2, the sexual organ lubrication is not enough. Poor vaginal lubrication of women is also easy to cause condom rupture, especially women over 40 years old, the secretion of fluid during sex is significantly reduced. Some young couples do not fully flirt before intercourse, there will be a similar situation. 3, the use of improper lubricant. It is observed that if the surface of the condom coated with mineral oil and vegetable oil such as petroleum jelly, ordinary emollient, etc., will weaken the strength of latex condoms within 5 minutes. 4, the amplitude of sexual intercourse is too large. A foreign study found that husbands and wives in the same room, rarely condom rupture, while men and other women sex, condom rupture more common, which may be related to the magnitude of sexual intercourse too large. 5, improper storage. Condoms exposed to strong light, high heat, humidity and ozone environment will lose its strength. If exposed to bright light for 10 hours, the condom rupture rate of up to 20%, stored in a tropical climate for 42 months, the condom rupture rate of 49%. Therefore, in order to become a real “condom”, condoms must be used correctly, the following is the correct way to use condoms: 1, each time you have sex with a new condom. 2, carefully open the package, do not tear the condom, do not use the damaged condom. 3, before putting it on the penis, do not unfold it beforehand. In the past, the first blowing check before use is no longer applicable, because as long as the product is qualified, there is generally no damage, and the packaging has been rolled, easy to use, if opened before use, but make it more difficult to wear condoms. 4, after the erection of the penis, the condom should be worn on the penis before inserting the vagina. 5.If you are not circumcised, turn the foreskin backwards, pinch the small bubble at the front of the condom and put it on the end of the penis. 6.While unfolding the condom up to the root of the penis, still continue to pinch the empty bubble at the tip of the condom. 7.If you see a break in the condom while wearing it or feel it has broken while using it, stop down immediately for a new one. 8.After ejaculation, when the penis is still erect, pinch its root and carefully pull the penis out of the vagina. 9.Gently remove the condom, taking care not to let the semen leak out.