John walked upstairs and stood still at the sound of music that evidently wasn't Sherlock playing his violin. He dared to open the door and widened his eyes in puzzlement when he saw furniture in the room moved away and Sherlock dancing in the middle of it with a broom. When the shock died out John observed him for a moment, noticing his dance moves were absolutely flawless.
"Want to join me?" Sherlock asked, turning around.
"What? No, no, thanks, I… have some work to do…"
John tilted his head.
"How come you're so good at it?"
"I've learned it," Sherlock answered, putting the broom aside.
"You should dance more often," John said and Sherlock looked up.
"Would you go to a ball with me?"
"As your partner?" John asked and Sherlock shrugged.
"Why not?"
"Do you want a list?"
John crossed his arms on his chest. He was a terrible dancer. He wouldn't even call himself a dancer. He was a terrible no-dancer.
"Right, show me," he said and Sherlock gave him a pleased look.
"Come here…"
John approached him and Sherlock caught him like he was a woman, leading him across the room swiftly. To tell the truth, John was surprised by the smooth and elegant way of his dance and it must have been clear from his expression because Sherlock lowered his eyes to him, smirking.
"Do I amaze you?" he asked in a low tone. John shook his head.
"Quite a lot, actually. Damn it, Sherlock, find yourself a woman. It's such a waste of dancing skills!"
Sherlock pouted, showing him a few more dancing steps. He stopped then, changing the music.
"I'm alright with my broom, thank you."
John sighed, sitting down on the sofa.
"You really learned it all by yourself? You took no course, no lessons at all?"
"All by myself," Sherlock said. "I wanted to attend the course at school, though."
"Why didn't you?"
"Because nobody would want to dance with the freak," Sherlock answered. John imagined again how Sherlock's childhood most probably looked like. A genius nobody understood, his intelligence casting him to a lonely, friendless place.
"Well, I think now there are many who would give anything for one dance with you," John said and Sherlock smiled slightly.
"Yours was for free."