Interesting Fact: Pumps are being used by a lot of men around the world. They force blood into your shaft, mkiang it swell up . A lot of men use these with great results, but like the supplements, the results are not permanent and have to be maintained. When starting out, the proper way to use them is to start out aggressively , and then cut down on the usage to maintain their gains. However, there is a fine line between aggressive usage and injury, so you should always follow the instructions included in the package you receive.