Sherlock likes fast, current music, John likes slow classical music. Actually, John likes when Sherlock plays the violin for him at reasonable hours during the day. John would sit and read while Sherlock plucked away, it was therapeutic time for both of them.

For Christmas, John wanted to get Sherlock something he thought Sherlock would enjoy, something he didn't have, and something that could keep him entertained when John wasn't around: An iPod.

"Really, John? What am I going to do with this?"

"Play music on it."

"Do I look like a teenager to you?"

"Harry has one. And she's about three months older than you."

Sherlock gave John his best straight, annoyed face.

"I'll take it back if you want me to, I just thought, well, actually, do you even like music? I mean, I know you like your violin and Mycroft's piano, but music. Do you like music? Geez, all right, you're right, I'll take it back."

"No!" Sherlock stopped John's hand before it reached the iPod. "No, John, don't be that way. I'll make use of it somehow, I promise. Thank you."

Three days later, while John was at work, Sherlock was looking up applications to get on his new iPod. He was no idiot to technology, he ran his own website, for god's sakes, but he did need some help in the app. department.

And music. What music was he going to download? Mycroft knew John was going to get Sherlock an iPod, so Mycroft took the liberty of getting Sherlock $100 in iTunes cards. Sherlock was just unsure of how to spend it.

So Sherlock started at the obvious interests: The Beatles. He'd liked them as a kid, he was not a complete idiot. He downloaded each of his favorites and thought of more artists.

Next were The Rolling Stones, but only a few of theirs. Then, he sat staring at the screen for half an hour, racking his brain for music. Any music. Suddenly, his head started bopping. A tune popped in his head and he couldn't figure out what it was.

"No you boys never know, oh no you boys will never know-Franz Ferdinand!" He exclaimed to himself. He smiled in his excitement and typed on the computer.

Then a new song popped into his head. "Last night, she said, oh baby- The Strokes!"

For the next two hours, songs popped into his head, one after the next, and he would type away.

"Hey Flathead, don't check me in, well hers is a tonic and mine is a-The Fratellis!"

"You use your heart as a weapon, and it hurts like-Coldplay!"

"Starlight, I will be chasing your starlight-Muse!"

"Ohhh, I tried to get to my taxi, the man in the track suite attacked me-Kaiser Chiefs!"

"Joanna drove slowly in to the city-Vampire Weekend!"

"Like a riot, like a riot ohh-Phoenix!"

"At my show on Monday, I was hoping someday-The Kooks!"

"I said I bet that you look good on the dance floor-Arctic Monkeys!"

The list was endless. He ran out of the gift card within an hour, and after that he used $178 of his own money. He was on a roll.

Finally, his mind stopped and he was content with the nearly 300 new songs he had on his shiny new iPod.

Then, he realized apps. will work even with music playing. So, for the next four hours, he sat on the floor, against an electrical outlet, playing Angry Birds and listening to his music. His head bopped up and down with the beats, his curls flopped about away from his head.

When John got home, Sherlock was in the same spot on the floor. He hadn't moved since he sat, he hadn't eaten that day, he hadn't bathed, not that John expected him to, and he was naked. No, no. He had underwear on.

"Sherlock?" John asked as he walked into the flat and saw his lovely boyfriend sitting next to a power outlet.

Sherlock didn't answer. His white ear buds were still stuck into his ears.

"Sherlock?" John asked while kicking at Sherlock's shin.

Sherlock removed his ear bud. "What?"

"Have you been sitting here all day?"

"What time is it?"

"4 O'clock."

"Then, yes."

"You couldn't have put pants on? Or a shirt?" It's not like John minded. John was now staring at the way Sherlock's stomach creased while he was sitting hunched over like that, and trying his hardest not to look directly at Sherlock's navy blue underwear.

"I just, I was, uh, I was making use of my gift, and, I, uh, got distracted."

John chuckled. He never thought a gift would consume Sherlock this much, but for the next four days, all Sherlock did was play with his iPod.

"Sherlock. It's time for bed."

"No."

"At least turn it down."

"No."

"Please?"

"John. The point of fast music is to play it loud."

"Then, play slow music."

Sherlock stared at John. "Are you serious?"

"You don't like slow music?"

Sherlock stared at John again.

"But you play the violin like a god."

Sherlock kept staring at John.

"I just don't like fast music."

Sherlock slanted his eyes and stared, almost angrily, at John.

"And you think you're an adult that likes adult music." John chuckled.

"I can like young music."

John laughed. Sherlock didn't like to feel so old.

So, for the next week and a half, Sherlock played his music to only himself, using the ear buds that came with the iPod. He played it during meals, going to sleep, on the Tube, in a taxi, walking down the street, any time. He even played it while he soaked in the bath. He ignored John, which John hated.

On the final day, John walked into the living room to see Sherlock dancing around in his underwear, the white ear buds plugged into his ears, and the wire coming from…somewhere.

"What are you doing?" John called to him.

Ignored.

"Sherlock, are you really wearing pink underwear?"

Ignored.

"Sherlock, you're acting like a child."

Ignored.

"Fine, Sherlock, play your music whenever you want. I don't care."

Ignored. John walked over to Sherlock, a little too curious as to where that wire was, and tugged at his underwear.

"Wow, John, what are you doing!" Sherlock jumped backward and pulled the ear bud out of his ear.

"I just wanted to see where you managed to put your iPod."

Sherlock lowered his underwear to reveal the iPod duct taped to his oddly hairless hip, no doubt he shaved everywhere for this purpose.

"You know, they make these straps to hold your iPod."

"I know, but then I'd have to get dressed and go to a store, and this was just much easier."

"Shaving your whole body was easier?"

"Yes, don't you like it?"

He did, oh did John like it.

"Then, don't complain." Sherlock said before John could answer.

And that is how Sherlock got John to let him play his young, fast music whenever he wanted.