It's Sherlock being Sherlock, of course.

[No need to break the 4th wall a second time tonight. It was very delicate and did tend to get cranky.]

Though now that I reconsider, I suppose you shouldn't consider this to be out of the ordinary at all, hm? I'm sure you're very used to my brother making you do the most mundane of tasks for him by now.

- MH

[So loyal and obedient, John Watson.]