Mamihlapinatapei (Yagan, an indigenous language of the Tierra del Fuego)—The wordless yet meaningful looks shared by two people who desire to initiate something, but are both reluctant to start.
John licked his lips. Again. It was driving Sherlock mad. The saliva left behind made John's lips glisten in the dimly-lit room. John looked up and found Sherlock staring at him. "Sherlock?" he asked.
Sherlock blinked. "Hmm?"
Sherlock closed his eyes and breathed out heavily. "Yes." John eyed him suspiciously but went back to reading the newspaper. Sherlock finally grabbed his violin and started playing a sad melody, so sad it made John's heart constrict and ache. John watched his friend, violin perched gracefully under his chin, spindly fingers holding the bow as if it were a precious artifact.
Their eyes locked and the melody changed a bit. It was still sad, but not mourning. It was…it was longing, John decided. Reaching and searching for something. Sherlock played for a few more minutes, his eyes staying locked with John's. John continued to lick his lips. The way Sherlock's fingers moved over each string was giving provoking in John some very vivid imaginings. Sherlock's fingers touching his lips, his neck, dancing over his chest and past his waistband. John almost let out a whimper as his eyes pleaded with Sherlock's.
And Sherlock's eyes looked almost fearful. The emotion he felt was flowing from him to the violin, but some of it detoured through the look he was giving John. He wanted to cry out his intentions, say that he wanted John to touch him and that he wanted to touch John, but he was scared. He had no experience with these things, whereas John had a lifetime's worth. He wanted it so bad, and he could tell John did too.
Sherlock's fear took over and he stood up, faced the window, and played a different song.