Testicle feeling purr purr is moving how to return a responsibility

The upper part of the testicle is connected to the epididymis, and there is a layer of muscle called cremaster muscle on the surface, which is used to adjust and raise the position of the testicle. Therefore, under normal circumstances, the human body will adjust the rise and fall of the scrotum according to the local temperature. If the local temperature is relatively high, the cremaster muscle will relax, the position of the testicle will decrease, and the surface area will increase to promote heat dissipation. If the temperature is relatively low, the cremaster muscle will contract, the position of the testicle will increase, and the surface area will decrease to reduce heat dissipation. In most cases, the testis is in a relatively relaxed state, because it needs a large surface area to ensure good heat dissipation, so that it can be 2 to 3 degrees below the body temperature, which is conducive to sperm maturation in the testis.