Molly can't sleep. He's been in her flat for 559 hours, day in and day out. It's unbelievably frustrating to have him like this in her life, to see him but unable to touch him; to hear him, and yet be unable to caress him; to smell him, and remain unable to taste him. - Molly's got a lot of frustration to work through. Sherlock, being Sherlock, comes up with his own way to help.