Why does penis become smaller?

Nowadays, many people judge the size of their penis by visual inspection and comparison. In fact, the length and distance observed by the naked eye are not the most standard. Some people just have personal psychological effects, which will cause the scene in front of them to change. In fact, the size of the penis should be judged by scientific methods. It is best to measure it and look at the penis development standards at different age stages.

The size of the penis should be determined by measuring the length, circumference and penis extension. A study measured the penises of 2,411 normal men aged 16 to 40, and after statistical processing, the normal values ​​of the penis (cm) were obtained: circumference 6.9 to 9.4, length 5.4 to 9.5, extension 11.0 to 15.7, erect length 10.9 to 15.3, erect circumference 9.0 to 12.5. Penises within the above numerical range are all normal.

People are different in height, weight, and size, so the size of the penis of normal adults naturally varies greatly. Especially when they are weak, the individual differences are even greater. Many teenagers find that other people's penises are "bigger" than their own when taking a bath, and they feel very distressed and even dare not go to the bathroom to take a bath.