No amount of exercise can make the penis larger once it is fully developed in adult males. In the case of underage males, the penis develops and grows larger on its own as they age. There is no exercise to make the penis bigger. Penile development in adult males has usually stabilized, and no amount of exercise, medication, or application of drugs can promote secondary development of the penis. There are individual differences in the development of the penis, which are related to genetics and physical fitness. It is only during puberty that a man’s penis is likely to grow larger with age. If the penis is too short, you can also consider penis enlargement surgery, but there is a certain risk of surgery, you should fully understand the advantages and disadvantages of surgery, choose carefully.