I ve been experiencing ED since last 3 to 4 yrs. Previously the issue was not as much as it is now. I am unable to maintain an erection and require constant stimulation/ masturbation to keep the penis erect. Since past few months i am unable to maintain erection during intercourse too. In short, penis is neither hard enough, nor does the erection last long enough. Kindly advice. I am 38 yrs old. Weight is 62 kgs. I do exercise regularly. I dont smoke or drink at all. I do have a history of heart ailments in my family. Never tried viagra.