I have a problem downstairs. I wake hard in the morning, but when it is time to be intimate with my wife sometimes it works sometimes it doesn't. I don't have stamina pre-ejaculation or I get excited but it goes limp before the act. I see a pattern with numbers, but just as i think I've figured it out it's not. It it is rather embarrassing and before I got type 1 I had no problems. Now, I might as well not even try.
There are many potential causes of erectile dysfunction. They include nerve damage, impaired blood flow, depression, drugs, testosterone deficiency, and other hormonal abnormalities. The fact that you get spontaneous erections suggests that the nerve function and blood flow are intact. That still leaves many potential causes. The best thing for you to do is to go to your healthcare provider. A review of your medications, a physical examination, and laboratory tests should be very helpful in identifying the cause of your erectile dysfunction.