Two halves?

Genesis 2:24 is responding to the question of why a person would leave the closest biological relationship (parents to children) in order to forge a relationship with a biological outsider. The answer offered is that marriage goes beyond biology to recover an original state, for humanity is ontologically gendered. Ontology trumps biology. This has shown Adam that the woman is not just a reproductive mating partner. Her identity is that she is his ally, his other half.—The Lost World of Adam and Eve, pp. 80–81

<idle musing>
I'm not convinced, but it is an interesting argument. And I definitely agree with his conclusion, just not how he got there.
</idle musing>