The foundation of gift giving is reciprocity. You don't gifts, you give obligations. The essence of the custom is that a person now has to go out and purchase a gift of commensurate value and representing the same perceived level of friendship as that represented by the gift he's been given. It's no wonder suicide rates skyrocket this time of year. Still, in my case I bring it on myself by being such an endearing and important part of people's lives...
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