system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: Why do the nerves on genitals produce pleasure when touched whereas those on other parts do not?
gpt
The brain.  Everything is how the brain is wired to interpret it.  For the genitals certain types of touch will be interpreted by the brain as pleasurable....... but a different touch in the same area will be interpreted as painful.  It all depends on how the brain interprets it.

It's take that from the amount of pressure, whether you're turned on or not, the type of movement and so on and so on.