Work Text:
Sherlock has a rather large collection of shoes. This is something that has brought a lot of pleasure and happiness to both he and John. One pair, however, he has never worn nor will he ever wear them. They once belonged to a certain female person that Sherlock refers to as the Woman. He took from her residence when he thought she was dead. He keeps them to remember she is not. John knows all about them and he 
is not the least be jealous because he knows that the Woman may have occupied Sherlock’s mind in a way that few people do, but he occupies Sherlock’s heart in a way that no one else ever has or will again.
Shoes - Yves Saint Laurent