The Adventure of the Swinging Hips
John was conducting an experiment.
Now, you might think this is a bit odd, as Sherlock is generally the one microwaving body parts and mixing chemical concoctions. But this was very important scientific research and, as Sherlock was busy with a case, it fell to John to collect the data.
Sherlock danced.
Sherlock danced all the time, really. He danced about the flat, he danced about the crime scene, he danced about the morgue. He had even taught John to dance for his own wedding, something which John now sincerely wished he could undo because Sherlock surely felt very used. But nearly each and every movement made by the tall, lithe detective was a dance, a sway, a swish, his hips somehow always moving at a different pace than the rest of his body.
This left John curious as to which types of music would elicit which types of dancing. So he put together a playlist of songs he liked and songs he thought Sherlock would like and he set about testing Sherlock's hips.
