I'd have to ask if the person in question is on Anti-Depressant drug therapy.
There is a proven link between AD drug therapies and the onset of E.D., especially with long-term use. Alcohol is also a factor in E.D.: one too many drinks, and the hydraulics of the ***** are affected, resulting in poor response or none at all. The mind is willing, the urge is there, but the physical response isn't.
A candid discussion with the family doctor is in order, I can't disagree.
Trivia fact: ****** is the greatest cost to the Veterans Health Administration in the U.S., accounting for almost 35% of it's annual spending.