Describing organisms or people that mate or marry outside their own group, population, or family.
From Greek 'exo-' meaning 'outside' and 'gamous' from 'gamos' meaning 'marriage.' This adjective form emphasizes the characteristic of seeking partners outside one's immediate group.
Humans are naturally exogamous in most cultures because our distant ancestors figured out that genetic diversity makes healthier babies—it's literally written into our social rules!
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