Knowledge of what goes on inside your penis and the simple anatomy of it will help you when working your penis, simply for the fact that you'll understand more fully what exactly you're doing. The penis is comprised of cells that enlarge when they fill with blood.

These cells are called blood spaces. The blood spaces are mostly within the main erectile tissue or Corpora Cavernosa. When you perform a stretch, your penis stretches the spaces in and around the Corpora Cavernosa. When these areas have stretched to a certain length, your penis will extend longer in both the flaccid and erect state. After performing these exercises for awhile, your penis will extend longer both when it is erected and when your limp.

All this Enlargement exercise is done quite safely and cannot hurt you in any way as long as you warm up properly, and use common sense. The penis may very well be the easiest part of the body to enlarge, simply because the penis is designed to enlarge. That is its purpose, and if it can hold more blood or expand due to exercising or stretching, over time it will become larger and thicker. By safely exercising the penis so blood fills the spaces and forces them larger, you can in fact grow your penis easily.