Immortalized in the movie ‘Austin Powers’, these vacuum pumps have been around for quite some time. The concept behind them is simple, such the male member vacuum until it hardens because of an overflow of blood.
This is going to provide a temporary enhancement that you might notice fairly quickly. However, the problem is that this is not a particularly gentle method, which means that it might be OK for one-time or even incidental use, but is certainly not good for a long-term option.
The primary problem is that long-term use can actually damage the elastic tissue in the male member. This is going to lead to lesser erections and may end up doing some serious nerve damage. While we might recommend it if you have nothing else available and are trying to perform immediately, this is not a good option for you in the end.