Lenore in 'The Raven' is the woman that the narrator deeply loved. She is dead, and her absence is what makes the narrator so melancholic. The whole poem is sort of centered around the narrator's mourning for Lenore, and the raven's presence seems to intensify his feelings about her loss.
We don't really know who Raven is just from 'Raven tells a story'. Raven could be an animal in a fable that has been given the power of speech to tell a moral - laden story. Or Raven could be a nickname for someone in a community who is renowned for their engaging storytelling skills.
The main distinction of porn with a story genre from regular porn is the presence of a coherent narrative. Regular porn often jumps straight to the sexual action, while the story genre tries to add some kind of story framework around it. But in the end, both are adult-oriented and feature explicit sexual content.
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.