To ensure domestic tranquility

I asked a coworker about his Holidays. He told me that Christmas Day was a whirlwind of activity, with his kids ripping open packages and playing with all their noisy toys.

"That must have been irritating," I said.

"Yeah," he replied, "but I got lots of peace and quiet the day after Christmas."

"How'd THAT happen?" I asked.

"I told the kids to leave me alone, and if they bothered me, I reminded them that yesterday they got toys, but I got the receipts."

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