Pumps are used by men who suffer from chronic insulin dependent diabetes or circulatory disorders.
Men with these conditions have such poor blood circulation due to their sugar metabolism, that they can't even get the blood flowing into the area. What the pump does for these men is stretch the skin and underlying tissues, allowing them to clamp off the blood flow and consequently trap it in their penis. With the clamp firmly in place, they can briefly have sex.
Take the clamp off and the erection goes away. Pump use does not increase your penis size, it only makes your erection depend on it. You might have even seen pumps advertised as "FDA Approved". Well, they are, but only for very specific health issues.
We have not seen one legitimate unbiased study concerning penis pumps. What the pumps will do is make your penis semi-erect so you can penetrate an orifice.
Our Conclusion: If you want to enlarge your penis safely and naturally, then please don't waste your time or money on a penis pump. They simply do not work!
We do not recommend the use of pumps!
Instead, we highly recommend an all-natural penis enlargement program such as PenileSecrets.com
Their program have been proven to safely and effectively enlarge the penis using all-natural exercises. No gadgets are required.