Hi, The penis size is fixed genetically just as many other parts of the body. And, the penis has no muscles in it. For these two reasons, its size cannot be increased through any medicines. Every penis is beautiful in its own way and can perform as well as any other penis. Its performance lies in its owner's performance, not on the size. SO, you need to learn the techniques of "using" your penis efficiently. Love it (and your body) as it is, and surely you will do well.