While marketing had a role in this, expensive and basically worthless gifts are used as expensive signaling, much like a peacock's feathers. Basically you're s

While marketing had a role in this, expensive and basically worthless gifts are used as expensive signaling, much like a peacock's feathers. Basically you're showing that you can and are willing to take a hit for your future mate. http://www.theatlantic.com/daily-dish/archive/2010/08/a-partial-defense-of-diamonds/182982/ http://www.theatlantic.com/daily-dish/archive/2010/08/a-part...