Erection may occur at any time throughout the day if you are sexually healthy. In order to achieve erections it requires sexual arousal or fantasizing. But sometimes erection may happen during sleep which is a sign of good penis health. And also pressure on the genital area can cause an erection.

When you are sexually aroused some kind of stimulation makes the brain and penis nerves to get erection. With this stimulation blood rushes in to the corpora cavernosa which contains veins and arteries that hold in-flowing blood and does not allow blood to flow out. This will expand the penis size and results to achieve harder erections.

The main reason for not achieving or maintaining an erection is lack of blood flow to the penis. It is difficult to achieve an erection with poor blood circulation. Sometimes when men are stressed out or worried about small penis size and having an unattractive partner can make impossible to achieve an erection.

There are sexual enhancers which have been used from thousands of years to drastically increase the sexual quality of men. These enhancers are made of natural ingredients to improve sexual performance. They are very effective to treat erectile dysfunction and premature ejaculation.