Pumps

Usually pumps works for about half an hour, this is unsuitable
for unexpected occasions, the pumps also these have been known to
leave: scars, bruises and in some cases gangrene, it can be a pain to
the penis.
Pumps works by put a tube over your penis and then pumping the air
from the tube. This swells the penis but does not increase the blood
capacity in the cells of the penis, which is necessary to achieve
permanent size gains.
Other downsides of vacuum pumps are: risk of temporary impotence,
risk of painful blisters, dislocating and bruising, bleeding from burst
capillaries and too much effort with too little result.
This Method is not recommended.