I recently turned 30 and just started having sex. When masturbating the past 3-5 years I had a fear that I don't feel very much sensation on the glans or shaft regardless if I am flaccid or erect (oddly I have significant more sensation in the frenulum, but often it is such an intense sensation that I can't tell if it is good or bad sensation). This fear has been confirmed.
When having sex for the first few times I thought it would feel so pleasurable that I would go ejaculate prematurely, but I have noticed that I barely feel stimulation, and the only reason I ejaculate is from excitement and be in positions the really stimulate the freulum, but it is difficult for me to climax.
Additionally I have no issue getting erect, but it feels like weaker erections They are not nearly as intense, engorged or rock hard as from my mid20's. When I touch my penis, especially the glans it usually feels quite cold. Both reasons make me think part of the issue is circulation. When I squeeze my penis I feel the pressure but no sensation of pain or pleasure, generally each sensation is quite numbed.
Until the past month I think I used to watch too much porno (now I have difficulty ejaculating without watching, so maybe I need to reprogram my brain), and masturbate too frequently per day (1-4 times), without lubricant and definitely too tight a squeeze especially when younger. I am trying ween off these habits.
I recently joined a gym to try and increase circulation throughout my body, started eating better, and using vitamin E lotion on my penis daily. The next step in my plan is to stop masturbating altogether for a while and try to let my body naturally heal. I am no doctor so I want recommendations on what other actions to take???
How do I test my penis to see if it is a lack of sensation or nerve damage?
Where are the nerves located in the penis? I thought mostly the glans, but I used get pleasure from the shaft, but I barely feel sensations from that area now.
Is there a medication or vitamin/foods I should start taking?
I don't want to bring this issue to my GP yet, since he is a relative and it is embarrassing.