The woman who marries, divorces, is single for a while, has several lovers, remarries, divorces, then marries for a third time can nonetheless meet the criteria for monogamy provided that she remains sexually exclusive within each relationship. Yet a man who is committed to the same woman for fifty years, but allows himself a one-night tryst in the fifteenth year, is readily consigned to the category of the infidel. If you’ve cheated, you’ve cheated.
