In response to Drake's pledge to make "No new friends," let us turn to the sage advice of the Girl Scouts: Make new friends but keep the old. The Girl Scouts never gave specific advice on how to go about making new friends, though, and dammit, it can
What I think is amazing about this scene is that Watson did not immediately correct Sherlock's assumption that Harry was male. He did not feel the need to prove sherlock wrong and didn't mention it until he asked about the accuracy. That's John :)
The thing that most american sherlockians don't realize is, in England "trousers" are "pants", and "pants" are "underwear". John isn't talking about Sherlock's pants he's talking about his underwear. One of my favorite scenes.