1. Domestic condom specifications
There are four specifications (standard sizes) of condoms in China, and the sizes of condoms from different brands are classified uniformly. The nominal width refers to half the circumference of the condom opening. The opening diameter of a condom with a nominal width of 55mm is 35mm; The opening diameter of a condom with a nominal width of 52mm is 33mm; The opening diameter of a condom with a nominal width of 49mm is 31mm; The opening diameter of a condom with a nominal width of 48mm is 29mm.
2. According to the opening diameter of the condom, it can be divided into four types: large, medium, small, and small
So, the four sizes mentioned above are large, medium, small, and very small. At present, the vast majority of condom models in China are medium size. Generally speaking, when using a condom for the first time, the nominal width is 52mm for a medium size condom. If it is not suitable, a thin line can be used to measure the length of the line in the middle of the penis after a complete erection. The circumference of the penis is obtained by dividing it by 2. Based on this calculation, a large or small condom or a very small condom can be used again.
3. If used for thickness segmentation, there are regular, thin, and ultra-thin types.
Divided by performance, wet and dry type (silicone oil coated on the outer surface of the condom), lubrication of the vagina during sexual intercourse). In terms of form, there are small sacs at the front end of condoms, and some condoms have flat front ends. Most condoms have a smooth surface, while a few have a gelatinous or ribbed surface. During sexual intercourse, the latter can increase a woman's sexiness.
How to use condoms
1. Before use, check the production date and expiration date. Expired condoms have deteriorated and are prone to breakage, making them unsuitable for use.
2. Condoms must be stored in a cool, dry environment that is not in contact with acids, alkalis, or oils. If it becomes sticky and fragile after contact with the above conditions, even within the shelf life, it should not be used again.
3. Condoms come in different sizes, and the appropriate model is chosen based on the size of the penis during erection. Otherwise, if they are too tight, they can easily rupture, and if they are too loose, they can slip off, which will affect the effectiveness of use.
4. The condom should not be unfolded in advance, and the erect glans should be extended downwards from the glans.
Before putting on the glans, the small air bag used to store semen should be squeezed against the top of the condom to prevent the air inside the bag from expanding and causing semen to overflow to the base of the penis during ejaculation.
6. Condoms should only use water-based lubricants. Vaseline, liquid paraffin, facial oil, edible oil, etc. can all increase the fragility of condoms in a short period of time, accelerating their rupture.