most sexual frustration/problems is due to stress in our lives. Look up Tension Myoneural Syndrome. If you can find out what the stressful thing is you've been repressing while realizing theres nothing seriously wrong with you its just your brody reacting physically to whats going on in the psyche. I had the same problem and I was cured of this. Now I can blow my load and stay hard over and over. Girls love me for it. Finding this out also cured my back pain, acne, acid reflux, headaches, and now I don't get aches anywhere. Hard to believe I know. But man if you even spend an hour learning about this and you think its true- your whole life will change.