In eighteenth-century New Zealand, English settlers soon learned that it was not a good idea to admire, say, a particularly beautiful jade pendant worn around the neck of a Maori warrior; the latter would inevitably insist on giving it, not take no for an answer, and then, after a discreet interval, return to praise the settler’s coat or gun. The only way to head this off was to quickly give him a gift before he could ask for one. Sometimes gifts are offered in order for the giver to be able to make such a demand: if one accepts the present, one is tacitly agreeing to allow the giver to claim
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