I loved this scene, because Sherlock did what I always wish I could do: mercilessly correct people's grammar. (Un?) Fortunately I'm not a high-functioning sociopath, so it would be unacceptable for me to do this.
Cuz he isn't. Like, he's not even close. He's just there. He's like the two guys in White Chicks. It's so obvious their not really guys, but some stupid people think that they are. Benedict, you are the only Sherlock for me, sweetie