A/N: I was thinking about the solar system and how Sherlock didn't care about it and this is the conclusion I reached.
One night, Sherlock and John were strolling down the streets of London with no particular destination in mind. The night air was clear and the rain that had been going on for days on end had finally lifted. The stars were out at full shine and the two men were enjoying the view.
They stopped and sat on a bench so that they could peer up at the eternal space.
Watson cleared his throat after a long while of them gazing at the view. "Say, Sherlock?"
"Yes, John?" replied the detective in a voice that said he knew a question was coming but did not yet know what it was and was therefore curious to hear it.
"Why did you truly never bother to know that Earth goes around the sun?"
His friend shrugged. "I didn't care."
"Because…?"
Sherlock smirked. "Because I am the center of this universe and that's all that matters."
The response was irksome and amusing at the same time, but Watson decided to give in to the latter. He chuckled lightly at his friend's narcissism.
"How did they really not know that you're a sociopath?" he wondered, recalling how the Scotland Yard officials thought his friend a "freak" and "psychopath."
Sherlock grinned. "Because Anderson's stupidity infected them and none of them bothered to do their research."
Watson stood and, in a way not unlike a circus performer announcing the next act, shouted into the busy streets. "Sherlock Holmes!" he declared, "center of the universe and the world's best sociopathic consulting detective!"