When it comes to condoms, those who believe in sexual activity do not know. Because male condoms are one of the most popular contraceptive methods. But do you really know how to use condoms? There are correct methods for selecting, wearing, and removing condoms. If the method is not correct, it may lead to contraceptive failure. The next editor will introduce how to use condoms correctly.
Selection of Condoms
When choosing condoms, the first thing to do is to choose a legitimate brand and not choose condoms without a trademark. Legitimate brand condoms have undergone strict screening and testing from material selection, production, and even before leaving the factory, making them more reliable in terms of safety and contraceptive function. Secondly, it is important to choose condoms of appropriate size. In China, there are four types of condom specifications, and the size classification of condoms from different brands is unified. (The nominal width refers to half the circumference of the opening of the condom): 1. Large condoms: A condom with a nominal width of 55 millimeters has a diameter of 35 millimeters at the opening. 2。 Medium size condom: A condom with a nominal width of 52 millimeters has a diameter of 33 millimeters at the opening. The hyperbolic cosine value of 3. The hyperbolic cosine value of 3. Small condoms: A condom with a nominal width of 49 millimeters has an opening diameter of 31 millimeters. The hyperbolic cosine value of 4. The hyperbolic cosine value of. Extra small condom: A condom with a nominal width of 48 millimeters has an opening diameter of 29 millimeters.
How to choose a condom size
After research, most men in China are suitable for medium-sized condom sizes. So, generally when choosing condoms, you can directly purchase medium size. After a single use, if you feel too tight or loose, you can wrap a thin thread around the middle of the fully erect penis, measure the length of the thread, obtain the circumference of the penis, divide by 2, and based on this calculation, purchase an appropriate size condom.
Preservation of condoms
When buying condoms, it is important to store them carefully. The principle is high temperature, high heat, and avoid getting close to chemicals to avoid corrosion. Pay attention to the shelf life of condoms. If condoms exceed the shelf life, do not use them again.
Check the condom
Before use, be sure to check the condom. Firstly, check the effective date of use on the packaging; The second is to check if it is in good condition, because if stored improperly, even within the expiration date, the condom may deteriorate and become ineffective. Once a condom is opened, it must be used immediately and cannot be used again. Because the strength of the latex film decreases significantly when exposed to air, sunlight, or warmth.