In general, they are not appropriate for public sharing. These stories are meant to be personal and private, dealing with very intimate aspects of one's life. Public sharing could make others uncomfortable and may even violate certain laws regarding obscenity in some places.
Yes, there are plenty. For example, historical fiction that focuses on strong characters fighting for freedom or justice. Novels like 'The Book Thief' which tell heart - warming stories during difficult times.
I'm not aware of many works that are solely based on 'erotic slave trade stories' as it is a very controversial and inappropriate topic. But if we look at works about the slave trade in general, like '12 Years a Slave', while it doesn't have an 'erotic' focus, it does show the various forms of abuse and power - play that were unfortunately part of that dark period in history. Any form of making the slave trade 'erotic' is wrong, but some works might show the seedy side of the power - holders during that time in a broader historical narrative.
The idea of 'erotic Greek sex slave stories' is not something that should be glorified or explored. Greek culture has a vast array of positive elements like democracy, theater, and scientific thinking that are far more worthy of our attention and study.