Though many men swear on the lasting enlarging effects of using penis pumps, the truth is that the "upshot" is only temporary. Here's how this pump operates: an easy-to-use hand squeeze pump creates a vacuum in the sleeve, and this pressure expands the blood vessels by increasing blood flow. In addition to the enlarging and aesthetic advantages, this process also sensitizes the penis to increase your sexual pleasure. We recommend using a pump for no more than half an hour, and that should be more than enough time to transform your member into an irresistible Adonis. A soft jelly lip around the cylinder sleeve creates a comfortable and tight seal around your penis, so press the release valve button on the hose when you're done to release the pressure. And remember, size does matter, so "rise to the occasion."