system
Given the following post, respond as if you're commenting on Reddit:
human
What separates the nerves of the glans of a penis from any other nerve?

I was thinking about this the other day while browsing some extra curricular sites - and it got me thinking: Why does the penis feel good in comparison to something more innocuous, like say - the nerves on someone's chest.

Is this an assigned quality of that particular nerve - or all nerves born equal, but with varied sensitivity? Like is there some kind of construction foreman during fetal development who's directing things and dictates 'Ok.. that's the penis - feel good nerves here!' And if that is the case, could it be theoretically possible to duplicate these nerves and wire them elsewhere?

It would be nice to be able to trigger orgasms by doing something more discrete, like scratching my arm or something.
gpt
Nerves don't feel things in the way you are describing. They act purely to transmit a physical sensation, in this case, of light touch. The pleasant emotion you are referring to is a construct of the brain. The nerves from the penis end up stimulating multiple areas of the brain associated with feeling good. They also act on other areas of the brain that go on to stimulate the various processes of orgasm and ejaculation.

Incidentally, there are other nerves that purely transmit the physical sensation of pain and many other types of physical sensation. These pain nerves will stimulate areas of the brain associated with negative feelings. 

The relationship between emotions/feelings, and the physical sensations we connect to them, is the job of the brain, not of the nerves themselves.

As for why those glans nerves end up stimulating pleasure centres of the brain more than say, touch sensitive nerves in the arm do, that's down to the evolution of the brain. It was evolutionarily beneficial to make sex feel good, so that organisms want to do it more!