If you do not tether “morality,” meaning the standard of right and wrong conduct, to the Bible or the Koran or the Mosaic Law or some other religious authority, then you must chose another standard. The Golden Rule? Hollywood? The ruling or dominant culture? What is in the best interests of society as a whole? Who decides that?
“The Golden Rule”
Precisely. The ONLY rules on personal conduct should be: do not steal from or physically harm your neighbor.
Anything besides that is nanny-statism or “pre-crime”.