Oh wow, thanks, the larger your penis the more gains you’ll make makes sense. Considering there is more blood to force and expand your penis. I am getting an image of blowing a balloon. It is hardest to expand the balloon when it is smallest, but the amount of force needed to expand it once it gets larger is decreased. Up to a certain point of course, which is when it’s about to pop. Let’s hope that’s not the same with penises. This is just a hypothesis
Search for the threads on volume. An inch in girth vs an inch in length. Also refine your question to differ between growth in inches or growth as a total percentage. A 3” penis may be easier to double in size than an 8” penis, just because there may be more hidden penis waiting to be pulled out of your body by simple lig and skin stretching.