This one deals with the penis pump. Penile enlargement via the use of a vacuum pump is called hyperemiation and is being used to treat erectile dysfunction. That increased pliability results in the appearance of greater length. Another theory is that the pump works in a fashion similar to muscular development. Blood enters the area and engorges the tissue.
Mileage varies from user to user.
No one can guarantee that it will work or that your money will be well spent. In fact, improper usage can do more harm than good. Ligaments are capable of being torn, tissue can be bruised or abraded. Before deciding whether to make an investment in one of these products there are a variety of factors that you should analyze. I, on my own, would never in a million years have thought to use a dick enlargement device.