Together, they walked down to the tree that morning- Christmas morning. John, excited, had woken Sherlock early. Well, "early". It was eight in the morning.
John had always loved Christmases. The whole family was together and happy, and not to mention they always had amazing meal for dinner.
Sherlock, on the other hand, had always disliked Christmases. He didn't get the point of it. They didn't need any more gifts than what they already had, and most of the gifts they got were useless to him anyway. He wasn't interested in the foolish toys and assorted rubbish he was given.
But regardless, Sherlock let John drag him into the living room, hand in hand in their pyjamas, where John grabbed a gift from under the tree and handed it to Sherlock.
Nervously, John watched Sherlock unwrap it. When Sherlock saw what it was, his nose wrinkled at the sight. He pulled out a classic awful Christmas sweater, and said to John, "Really, John? This is awful."
John frowned to himself, disappointed that he hadn't gotten Sherlock something he would appreciate more. But when he looked up to see Sherlock grinning as he pulled a gift out from under the tree for John.
Confused, John opened it, and when he saw what it was, his grin couldn't have been wider.
"Now we match," Sherlock grinned as he leaned close into John for a kiss.