Answer analysis
The development and growth of the penis is related to the sex hormones in the body. After the adult male has completed the development, it will not grow again. However, through reasonable exercise, the penis can be thickened and hardened. The penis is mainly composed of smooth muscles. Through pressure training, the smooth muscles can be fully refined, blood circulation can be promoted, blood supply capacity can be increased, and muscle elastic fibers can be strengthened, thereby achieving the effect of thickening and hardening. At present, effective physical training methods include: Arabic training method, PC muscle training, Kegel exercise, etc.