Winter
There were certain things that most people enjoyed about winter. Some loved snow, some loved drinking hot chocolate, some loved bundling up in warm blankets and sitting in front of a blazing fireplace. Sherlock and John enjoyed this last one particularly. In the winter, whenever it had been a particularly tiring day, or maybe just a dull one, one of them would light the fireplace while the other grabbed the duvet off of their bed. Inevitably, on a cold winter's night, the two would end up snuggling together in front of the fireplace until they fell asleep, sharing body heat.