Alright. This one goes out to John's mustache, that dastardly thing. Blast it all, it's hideous. Hope you catch the joke in this, or else it might seem a bit pointless and nonsensical. PM me if you need anything, like an explanation, it's not a bother to explain.
A mustache had grown on John,
All while Sherlock was gone.
John Watson your face?
Dear God, the disgrace!
The pun didn't lessen how wrong.