What’s the difference between erotica and pornography?

How does one determine the difference between erotica, which I believe you have said is OK, and pornography?

I wrote previous posts on both erotica and pornography that I hope you will find useful:
Is erotica ever appropriate?
Would you put erotic dancers and strippers in the pornography category?
How would you define pornography?
Further comments on “How would you define pornography?”

In the end, however, it is important for you to come up with your own definition of these terms and how you relate them to your spiritual and relational values. What do you find edifying to your life (in all aspects) and what do you not?