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Possible underlying causes of a bent penis include: 1  Normal differences in penis anatomy. 2  Autoimmune disorder. 3  Inherited fibrous tissue (collagen) abnormality.  Injury to the 1  penis. Peyronie's disease (a curved erection caused by one of a number of underlying conditions)
Common Causes of ED. What causes erectile dysfunction? More than 90 percent of all ED can be traced to a physical (organic) cause. This cause is usually due to slow and steady decrease of blood flow to the penis, which eventually leads to inadequate and inefficient blood storage in the penis after it becomes erect. This is commonly referred as a venous leak.