Hello doctor! I believe I am suffering from ED. I am 20 years of age, non-smoker, non-drinker and have never used illegal drugs. I maintain a healthy lifestyle, sleep 7 hours per day on average and play football. The problem first started a long time ago, but I have never had relationships before 3 months ago and did not pay attention to the problem. Now the problem is the following. I feel that my penis is insensitive as I cannot use condoms, I just don't feel anything with them on. But when I have sex without them, I can't get a 100% erection. A doctor once offered me to try Viagra and my erection was extremely satisfactory. But I don't want to use these drugs, I want to achieve such results naturally. What could be the problem and how could it be tested/treated? Thanks!