It is normal for an adult men&39;s penis to be 15cm in an erection state, so don&39;t worry too much. In the weak state of Asian men, the penis is about 37cm and the erection is about 1016cm, so 15cm after the penis is within the normal reference range.
The penis is a male reproductive organs. Under the action of sexual stimulation, the venous blood vessels of the sponge body will be open, and the venous blood will be irrigated into the sponge body to form a physiological phenomenon of erection. Only when the penis can be erected normally and can maintain sufficient erection time, can they complete a satisfactory sexual life, otherwise it is an erectile dysfunction.