During the 20th century alone, the population in the world has grown from 1.65 billion to 6 billion. In 1970, there were roughly half as many people in the world as there are now. Because of declining growth rates, it will now take over 200 years to double again.
This phenomenon is very common and manifests itself in the form of the condition known as Weak Erection - when the penis is engorged with blood but not to the extent that it is hard enough for pleasurable intercourse. A weak erection is caused by insufficient blood flow to the penile sponge-like tissues.
Erectile dysfunction, also called impotence, is the inability to develop or sustain an erection satisfactory for sexual intercourse. Though prostate cancer is not a cause of erectile dysfunction, treatments for the disease can cause the problem. These include: Surgery to remove the entire prostate gland.