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.
Martin looked so sad at not being mentioned first and then his smile :) Aww!>>>and in the first pic Ben is look "What wit yes that's me." And in the second he's like "I WILL MURDER YOU IN YOUR SLEEP!">> this is why I love this Fandom