He feels so seen and looked after when she kisses him like that. To be treated so gently and kindly just fills his heart.

He smiles - less sadly - and pulls back to pick out sandwiches. He hands her a couple to choose from, and then pulls out one and tosses it to Sherlock. "Try this one, I want to hear what you think," he says to Sherlock. He is absolutely going to exploit those tastebuds of his.