2
Squeeze around the penis with your thumb and forefinger, and slowly slide forward, forcing blood to flow forward into the cell wall and glans penis for 15 minutes every day.
three
Grasp the penis root and pat the thigh root until the penis is weak. After a month, you will find it worthwhile to spend 15 minutes every day.
four
Eat more foods containing more protein, don't eat too much fat, and do more exercise.