Here's the way the nervous system was explained to me, a long time ago:
Think about electricity to your house.
There are wires from your house to a "feeder line" that connects to the other houses on your street.
The "feeder line" connects to a "main line".
You're sitting in your living room, reading a book, and the lights go out! You look around, thinking the bulb has burned out in the lamp -- and indeed -- all the other lights in the house are working. So it's a very small electrical problem,-- in the body, a pinched nerve, that will recover when you "screw in a new bulb" -- shake it, move around, get the blood flowing.
OR: you look around, and realize the lights are out all throughout the house, but your neighbors have lights! The problem is with the line from your house to the "feeder line" -- in the body, that would be "peripheral neuropathy" -- the nerves from your extremities to your spinal cord are impaired in some way -- but the central nervous system -- the "main line" is functioning fine (no lesions appearing on repeated MRI's of either the brain or spinal cord"
OR: you look around, and realize the lights are out through the entire neighborhood -- a "central nervous system problem".
So a peripheral nerve problem means that somewhere in the nervous system pathways from your extremities (arms, legs) or other more outer areas of the body there is a problem, but the central nervous system is working properly. The nerves that create sensations like touch (your hands, and yes, your sex organs) are impaired -- signals aren't being transmitted properly to the central nervous system -- but the central nervous system is not impaired.
The next step will be to try to figure out what the peripheral nerve problem is. If it's in the extremities, maybe there's a pinched nerve, or series of pinched or injured nerves somewhere. Or maybe in your spine (which could lead to problems with your extremities and sex organs) there's some mechanical malfunction.
Anyway. Maybe this makes sense?