Got any sources about the porneia that doesn’t have any biblical sources?

Yes I will find some that are not behind academic paywalls

The Greeks had homosexual relations, so how was it outlawed?

I didn’t mean to imply it has a single universal application. The situation in which it was used would have been relevant because it meant sexual immorality in the general sense and how that’s understood depends on who you’re taking to. The greeks would have heard the word different to first century Jews. But my point was that Jesus was teaching first century Jews and they had a very well defined idea of what sexual immortality meant.

I might have made my point better by saying Jesus didn’t talk at length on numerous sexual laws like the Torah does because he simply reaffirms Jewish belief.

At the end of the day it doesn’t really matter

If two and a half billion people were basing their lives on The Lord of the Rings it would be a worthwhile area of study whether one believes in elves or not