So what if once Rosie and John move back in Sherlock is doing all he can to keep off the cigarettes. Cause he knows the risks of secondhand smoke and while he was sure John would be just fine, he’s taking NO chances with baby Watson. So he buys the patches. But some days he needs to do something, the nervous energy is too much. So he gets the gum and the chewing helps but he finds that just occupying his mouth isn’t enough. So he starts buying lollies in bulk to give something to do with his hands. And the lollies, in conjunction with the patches, help considerably. And then he notices how John stares whenever he’s got a lolly in his mouth. He licks his lips more often, his eyes dart away guiltily whenever Sherlock catches him staring, and he clenches his fists in a way that Sherlock’s come to know as his “I want to touch the thing but I can’t touch the thing” clench.
So he starts playing it up purposely. Pursing his lips around the lollies as he pulls it out every so often, letting his lips get shiny with sugar and saliva. He Lets the candy push his cheeks out obscenely as he holds them in his mouth. He twirls the stick in his fingers,
Finally, John snaps. “That’s obscene, you know,” he tells him, clearly frustrated.
“What’s that John,” Sherlock will ask, tapping the lolly against his lips, staring off into space, knowing exactly what John’s talking about.
“What you’re doing to that candy. You know, people charge by the hour for that kind of thing.”
“Then you should be happy, you’re getting it at a discount,” Sherlock replies with a smirk.
“Oh, for the love of,” John grumbles, walking away.
Sherlock’s voice stops him, “John.”
John turns back to him, hands on his hips. “What?”
Sherlock smiles, shoving the lolly back in his mouth. Sucking it in. Then, around the candy he asks, “want a taste?”
It takes three blinks for John to walk over to him, hold Sherlock’s face in his hands and say, “oh God, yes,” before pulling the lolly from Sherlock’s mouth to kiss him.