Moralty comes from regions of the brain based on positive and negative input and our ability to process information. That being said, what is the governing force behind sexual morality?
An interesting study showed that societies where women were economically dependent in their relationships, frowned heavily upon promiscuity, while those that had less or no economic dependence on a male partner were less concerned with promiscuity. While religion tends to flourish in societies steeped in female economic dependence.
“Our results do imply a hypothesis for why religious and conservative ideologies themselves tend to be anti-promiscuity: because they emerged in environments characterized by high female economic dependence.
When abrahamic religion talks of the origins of morality, the rarely mentioned but main concern of morality is sexual purity in women. It’s origins are primal, and male dominant religious cultures genealogy is a keypoint. Same as the apes, it was all about maintaining control of food, territory, and sex. Keep the harem closely guarded.