Well the first hint that John was interested in the guitar was when he saw it in a shop window. They were just walking home from a case and they were near Baker street so they thought it would be best to walk. "No really Sherlock that was..." John trailed off as he walked by the shop window and stopped in front of the glass staring at the guitar.
"John?" Sherlock asked as he followed John's gaze. "You play guitar?"
"Oh, yeah thought you would have deduced that form the calluses on my fingers." John said barely holding the awe out of his voice.
Sherlock is quiet for a moment "Come on, John." Sherlock says says as he walks toward the door of the store.
"Sherlock? What are you doing?"
"Getting you that guitar obviously."
"What? Why?" John asks confused.
Sherlock sighs."Because John I want to hear you play."
"No, no Sherlock. I have not played in a long while I have more than likely forgot everything."
"I will come back to John."
"Fine. Get me the guitar."
Sherlock smiles and runs in the store and minutes later he comess out with a guitar, a pick and a tuner.
"Come on John. Let's get back to the flat so I can hear you play." Sherlock then walks quickly in the direction of th flat with John close behind. When they reach Baker street Sherlock pulls out his keys and opens the door to the flat.
"Here John," He hands off the guitar to John "Play me a song."
"Let me think." John says. He then closes his eyes going as if he was going threw a mental playlist. Until final he opens his eyes and says "This one will do nicely."
John holds the guitar in the right position and starts to play. Sherlock immediatey knew it as I wanna hold your hand By The Beatles. He can hear the lyrics going threw his head.
Oh yeah, I'll tell you something
I think you'll understand
When I say that something
I want to hold your hand
Sherlock leans back in his chair and smiles as the lyrics run threw his head. He barely notices when the song ends.
"That was wonderful, John." Is all Sherlock says.
"Yeah well I'm a bit rusty." John says with a small chuckle.
"John," Sherlock says his voice flat. "You could have fooled me into thinkig you could have just praticed yesterday."
"I'm that good am I?" John says.
"Yes, you are John."
John yawns "I'm tried 'Lock see you in the morning"
John walks up the stairs and Sherlock registers what he was just called.
" 'Lock?" Sherlock brows furrows. He will have to ask John about that later.