As soon as men first hear about hand exercises they suspect there's no way this is possible, because they think that they would have heard about them by now.
Hand routines are real and the explanation why you potentially haven't heard about them is the men who have gotten inches bigger from them don't want you to know, so they pretend that they have never heard of them, and do their best to dismiss them and tell you that injury will occur.
You want to do further research, because they are real and they are the only thing that works.
Guys want to know if the penis isn't a muscle, how does one get reactions from something that's not muscle at all? Many men do hand exercises, and what they are doing is working out tissue and ligaments to elongate their erection size.
Tissue in your manhood is known as the Tunica and it's dense fiber is capable of expansion.
Inside this sheath of the shaft are cavities that hold blood when a man gets to an erect state.
These areas are known as the corpus spongiosum and corpus cavernosa and when you increase the size of their holding capacity, you increase the ultimate size of your erection.
This concept is pretty easy to understand, but some men just don't believe it is real.
This is the only thing besides a medical procedure that will make your larger for life, nothing else will.
  When you get to your desired size, you stop and the gains stay, because this isn't muscle, there is no continued maintenance.