What's your diet like? Are you on blood pressure, diabetes, or heart medication? The same thing that creates atherosclerosis in our arteries can create a thickening of the walls of our veins. There is some evidence that adult-onset of spinal problems as well as impotence is highly correlated to the standard American diet. As are all the other diseases I asked you about.
Erectile disfunction a precursor to heart disease?
Because penile arteries are only about half the size of the coronary arteries in the heart, erectile dysfunction can be a powerful predictor of cardiac events—such as sudden death.
nutritionfacts.org
One specific reference on a plant that can help some.
What are the effects of both oral and topical application of the spice saffron for impotence in men?
nutritionfacts.org