It may appear unusual at first to believe that sex may become an addiction.
It’s an innate biological activity, not a chemical consumed into the system.
But even as intoxicants and drugs may become habit-forming, so may natural activities like eating and sexual activity.
These activities become problematic when they’re utilized as a means of escaping hurt or tedium, and when the behaviors carry on even when they get destructive.
Some people have described sex addiction like this:
The substance utilized was humanity.
You marshal all your intellect and appeal and power to keep the dependency alive.