Am I?

[Sherlock shakes the distilled water bottle a bit before he squeezes it and sends a steady stream of water into the wound.]

I guess that means you don't want me to warn you about what I'm doing.

[It doesn't matter much on his end since he isn't the one that will need to brace himself for the onslaught of pain. All of this is his way of trying to be gentle and caring, but it's discouraging with a grumpy patient.]

Your drink's right there. Feel free to take it up any time.