because I am trash, just imagine this for a second:
Sherlock and John are in a recently established relationship and one day John is teasing Sherlock after a particularly stroppy performance of his violin one day and suggests, “Why not instead of screeching through that thing when you’re in a mood you just sing me a song, sometime?”
He says it as a joke, because the point of Sherlock playing his violin usually means he’s not interested in talking, let alone singing; which John has already never heard from him and never expects.
Then one day, out of the blue, Sherlock pulls out the violin when they’re just settled and in one of those peaceful moments. The moments where they share an atmosphere and don’t require conversation to be comfortable.
Sherlock pulls out the violin and sings this along with it, and as soon as he’s begun, John stills for a moment before lifting his eyes to look to him. Sherlock’s not meeting John’s gaze, but he can feel it.
He continues to play and John is astounded by yet again how human Sherlock can be. He feels a swell in his chest at the thought of how yes. These moments are just for him.
He can here the subtle hesitancy in Sherlock’s voice and the occasional wavers but at the same time is convinced he’s never heard anything more soft from the other. He’s different as he sings. He doesn’t want to stop the music so he keeps going, but it’s so genuine John can’t help but remain silent for moments after the song ends.
Finally Sherlock speaks up, his face flushing as he gradually gets more fidgety and impatient and says, “John, say something.”
And it’s all John can do to hold still for another two seconds before rising and closing the space between them in a seemingly single, swift movement, so that he can kiss him in place for his loss for words.