There is an herbal supplement product called Muira Puama that can make your cock feel more sensitive. I take some frequently. After a couple of hours I feel a little bit of a pleasant itching sensation and a general feeling of increased horniness. It's a kind of subtle feeling but definitely noticeable.
I buy it at a health food store. The brand is Solaray and it comes in 300 mg capsules. The dosage is supposedly two capsules, but I never take more than one.
I've never experienced any unpleasant side effects from it, and unlike many herbal products, it doesn't seem to affect my blood pressure.
I rarely take any of the prescription ED pills because of the delayed orgasm effect. Instead I take a big teaspoon of l-arginine, some Muira Puama, and zinc, vitamin b6, and magnesium about two hours before sexual activity. It doesn't make me feel and perform like I'm eighteen again, but it helps some, it's cheap, and doesn't have any side effects.
Another thing that can help with delayed orgasm is kegel and reverse kegel exercises. They are frequently advocated for dealing with premature ejaculation, but ironically they can also help with delayed ejaculation. Getting more voluntary control over the muscles involved in ejaculation apparently helps to compensate for the desensitizing effect of the ED medications.