&gt; In enforcing monogamy, we ensured that male got what they wanted (a young woman) and now, that male can focus his attention on work. This worked well for women too (if they had a choice of male) since they now have a partner as well. Adultery was looked down upon to preserve the &quot;sanctity&quot; of this 1:1 relationship.<p>Adultery has been &quot;looked down on&quot; (to put it mildly) for a lot longer than monogamy has been a norm.