Diamonds: They’re large, precious, and fought violently over. Rory Sutherland, vice chairman of advertising giant Ogilvy & Mather Group, weighs in on why some women supposedly love them:

Sure, it may be reductive — nearing the point of sexism — but Sutherland’s general point stands: People appreciate gifts most when they’re truly selfless!

Previously: Rory Sutherland talks at TED about the power of perceived added value.

[image via Marjolein in Lincoln]

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