"What are we doing here, John?" Sherlock looked around the electronics store with an expression of utmost boredom.
"We are here," John said absentmindedly, looking over the store's advertisements in the paper, "to buy a new TV. Ours is broken, remember?"
"I only missed by a little bit," Sherlock said irritably.
"A little bit is still enough to shoot a hole in the screen, Sherlock," John answered, his tone full of strained patience. "This isn't a conversation I should have to have with a grown man. Remind me to take you to the shooting range so you can learn to aim."
Sherlock tried and failed to come up with a retort, but the truth remained that John was a crack shot, and Sherlock could stand to learn a lot from him about firearms.
"How large a screen do you think we need?" John asked.
"I don't know," Sherlock answered. Then, just to annoy John, "A larger screen will give me a better target."
"Good point, smaller it is." At this point, they both noticed the sales assistant abruptly decide to leave them after hearing this. Catching each other's eye, Sherlock and John burst out laughing.
"He was going to overcharge us anyway. His flatmate doesn't pay his rent on time," Sherlock said.
"Right," John said, too used to Sherlock to be surprised anymore. "Well, I think this one should work." He pointed out a flatscreen that was the same size as their old TV and Sherlock just nodded, not really interested.
John loaded the box onto their handcart, and then, inexplicably started singing along to the song playing over the shop's speakers, "Na, na na nanana na, hey Jude."
"I've never heard you sing before," Sherlock said, putting all his attention on John. Singing wasn't usual. John didn't sing. That didn't make sense.
"Oh, I don't know. It's the Beatles. Hey Jude," John shrugged. "You kind of have to sing along to it."
"The who?" Sherlock asked.
"No, not them, the Beatles," John corrected absently, then looked back at Sherlock in disbelief. "Don't tell me you've never heard of the Beatles."
Sherlock hated admitting he didn't know something and had to remind himself there was no need for him to know who this band was. "We listened to classical music in my house, John."
John shook his head, "You and I are going home right now and listening to the Beatles. No buts. You're musical, you should appreciate them."
"Fine," Sherlock said reluctantly. Except, when they got home, he was surprised to find that he actually liked the band. He found them interesting, both musically and lyrically. Not that he'd ever tell John that.
Not until John entered the sitting room one day to find Sherlock figuring out how to play "Let It Be" on the violin. The smug smile didn't leave his face all day.
A/N No explanation, just that I'm a shameless Beatles fan so here you go.