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Embedded in the idea of survival of the fittest is survival of their children.
No one has given a label to these different stages.
Even then, the participants sometimes have the right to say no.
These cultures demonstrate that love is not a necessary condition of a marriage.
Usually, the males are demonstrating to the females that they are genetically well-endowed and strong enough to defend the female and the offspring they expect to produce.
They do this by showing off their plumage, or their antlers, or by strutting back and forth in a complicated dance—or in any of a number of other subtle tests of strength and courage.