I find that I am able to achieve and maintain an erection easily with my partner. However, I receive little pleasure from oral sex and intercourse - in fact, it feels as though my penis is almost numb (though not quite). I am able to orgasm easily when I masturbate.
Could this be the result of chronic masturbation? Any suggestions to rectify the situation? I thought perhaps if I gave up masturbating, my penis would become sensitive to sensations other than my own hand.
Your hand doesn't stimulate your penis in a different manner than a mouth or a vagina. All three use lubricated friction. The normal difference is pacing. With a partner you have less control over the speed and pressure applied to your sex. You may try different positions to find one the gives you more of the sensation you need.
The only way masturbation could have affected your ability to feel is if you injured yourself in the process. Have you ever had scarring or bruising on your penis after masturbation? Have you ever felt pain after masturbation?
The reason is because you are circumcised. I will go on a limb & assume you are, because I am and I have the same problem. The glans isnt the most erogenous part of the penis, and over time it becomes keratanized due to exposure to the elements, desensitizing it further.
The majority of erogenous tissue & pleasure zones on a man is in the foreskin, which its sole purpose is for sexual pleasure, as well as protecting the glans & keeping it sensitive.
Depending on how much foreskin was removed will equal how much sensitivity & pleasure you will loose.
Its a hard truth to swallow & too many people deny & ignorantly dismiss it, but that is the truth of the matter.
There are ways to help though, just google foreskin restoration & sen-slips. They can help bring back some sensitivity that has been lost due to keratanisation.