It's not straightforward. Reading sex stories may or may not be considered porn addiction. If it becomes an obsession where you can't control your urge and it negatively impacts your work, social life, or self-esteem, then it might be crossing into the realm of addiction.
Not necessarily. It depends on the context and the way it's presented. If it's part of a mature, well-written story with a purpose beyond mere titillation, it might not be classified as porn.
Such comics are usually of an adult nature, featuring sexual and pornographic elements. They are not within the realm of acceptable or legal content for widespread consumption or discussion.
Well, it's hard to say for sure. The concept of 'porn-like' is quite subjective. Some might consider certain novels with excessive sexual descriptions as such, but it depends on individual perspectives and cultural standards.
In many places, 18+ porn comics are considered illegal. This is because they can have a negative impact on society and violate moral and legal standards.