28 but Can't hold the erection for long

Erectile dysfunction is not just limited to older men and men with diabetes or on blood pressure medication. In younger men, it can be something as simple as riding the bicycle for too long. The shape of the regular bicycle seat is such that it tends to press on the nerves and blood vessels that supply the genitals to cause a numbing effect. Using a wider and better-cushioned bike seat will solve the problem. In others, ED can be a result of testosterone deficiency. This can be determined with a simple blood test at the doctor's office.