Acts 15:29-- "unlawful marriage" or "fornication question...?

By reading God's laws in the Old Testament we understand what is right and wrong. Fornication is any ual activity between people who are not one man with one wife. "Unlawful marriage" is just a way of saying "any unmarried people having ". Same marriage would have been considered by people at the time as a perversion of the nature of all humans. It would've been the same for Jews or Gentiles.