Sadly, my penis sensitivity has been in decline for years. I was recently so bad that I could not reach c1imax with the wife at all.

I tried Man 1 Man oil to the Glans for several months to no avail. --((

Then I started taking L-Argenine 2 times daily and saw no improvement. L-Argenine is used to boost Nitric Oxide in the blood to youthful levels, just like v1agra, and helps blood flow.
https://thepenissizeguide.com/nutrition/l-arginine/

I also started taking 500mg Niacin which boosts blood flow through blood veins, and saw no improvement.. It also has many other health benefits.
http://www.life-enhancement.com/magazine/article/2483-niacin-supports-erectile-function

I am now testing Lugols Iodine diluted in 90% water. Applied to scrotum & glans. This morning was a success with the wife. :---))
I'll update this thread if this treatment continues working.

Are there any additional supplements that have helped you with bad penis sensitivity problems?

Grizz