Kiss

Inspired by a Tumblr post - "But imagine Spock pulling McCoy aside, just for a moment, to show him the kiss of his people. He would lift his two fingers, looking down at the doctor expectantly, and McCoy would return the action. He would see the reaction it had on Spock, the way it released some sort of tension in his shoulders that McCoy didn’t even realize was there, and that would be the start of that. It would be McCoy who insists on doing it all the time, sometimes even catching Spock off guard, but he certainly wasn’t complaining. With clever, nimble surgeon’s hands, a scrape of fingers could become a kiss, and a rub of hands when passing through the bridge could start something almost desperate. "