>>282021480
It is sort of possible to gain some length by doing a combination of core exercise, cardio, kegels and manual stretching, this is especially true if you've been sedentary your entire life, but don't expect 4 cm gains, it's more around 1 cm at most. This has to do with vein capillarity, if you have never done proper exercise your entire life chances are your dick veins have not expanded properly, so there are some gains to be gotten there. Fact is your erection and general blood flow situation in your penis is a great indicator of your heart health. Of course if you are already fit and a dicklet, you will remain a dicklet.