Advent Drabble 17 - Nature and Nurture

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Requested by hominysnark 

“Every year,” John complained, “too many people send us Christmas fruitcakes. You need to start telling the clients not to send us Christmas fruitcakes, we don’t need any Christmas presents.”

“Client interaction,” Sherlock replied. “Sounds like your thing, not mine.”

John went away grumbling.

“Besides,” Sherlock whispered to Oliver, “we need to do our fruitcake experiments, don’t we?”

“This year can we drop them from the roof, Dad?” Oliver asked eagerly.

“Absolutely,” Sherlock promised.

“No, seriously,” John called from the kitchen, “way too many fruitcakes! And all of them inedible, hard as rocks!”

Sherlock and Oliver beamed at each other.