Common knowledge about male physiology

　　1. Sometimes having an erection is not a good thing

　　In order to make their "little brother" stand up and keep them up for a long time, many men put a lot of effort into it. But sometimes the "little brother" lasts for a long time, which is not a good thing. Not only will people not be able to appreciate the joy of sexual desire, but they will also be unable to enjoy it and suffer from it. Because the penis is mostly composed of spongy bodies, covered with a layer of epidermis. When sexually excited, the spongy bodies will be filled with blood, making the penis hard, long, and thick for sexual intercourse, which is the so-called "erection." It is quite painful if the penis remains erect for too long and cannot subside.

　　2. The difference in size of the “little brother”

　　Just like people's bodies vary in height, shortness, fatness and thinness, a man's "little brother" also has individual differences. However, the penis size of Asians is not much different, generally around 10 to 15 centimeters. What needs to be understood is that sexual ability has nothing to do with the length of the penis. The bigger the penis, the more useful it is. If it is not particularly short, it generally does not have a big impact on sexual life. Therefore, when it comes to the size of your "little brother", don't show off your strengths by showing off others' shortcomings.