Hello and thanks for your query. From the description of your problem, it appears that you are suffering from premature ejaculation. As you said, there could a hypersensitive response of the penis which is causing your problem. In this case, I would suggest that you can try applying a very thin layer of 2% lignocaine jelly on your penis before intercourse. When using a condom, you can try climax control condoms. There are few sexual techniques like the squeeze technique and start-stop technique which will help you gain better ejaculatory control. If the above simple remedies don t work, then you can try medication like Dapoxetine after consultation with a doctor. Best wishes.