A Discourse on the Inadequacy of a Duvet

For a prompt: Sherlock keeps stealing the covers when they share a bed because he wants John to move closer to him when they are sleeping but of course doesn't want to ask. John gets annoyed at first until he realises what Sherlock wants and is more than happy to oblige.

John looks over at the folds of covers gathered on the opposite side of Sherlock's body, then glances up at Sherlock’s face. “You’re doing it again.”