I really have not read or researched anything like that. However, while i was in South Korea, i tried some Ginseng. It seemed to work very well? I stayed hard all night long, and was ready for action, as well.
Look it up, and if you try it, let me know how it goes. DennisView Thread
No, it may be maddening not to feel sensation, but i don't believe it leads to low libido. Low libido may be caused by low testosterone? Have the urologist, or even your primary care Dr. give you the blood tests.
Do you exercize reguarly? If you have low stamina, perhaps a diet, and exercise program would work for you? Talk to your Dr. about these concerns, i am sure they can help you. They have helped me tremendously. Exercise helps with blood flow all through our bodies. It has even helped with my E.D..
It sounds like you are overthinking? Try to just relax, and let it flo. Or, you could be experiencing Anorgasmia? Talk to an Urologist. He/she should be able to help you.
I too, suffered with anorgasmia/loss of sensation of the penis. I found out it was from over masturbation. I was trying too hard to achieve orgasm, that i was overthinking, and worried that i wouldn't orgasm. I was stroking way too hard, and not relaxing, and letting it happen. After talking to my Dr., she told me to relax, and think only of the moment. And that i should stop for awhile, to let the sensation come back. It worked for me.