The reason the Grey Walled Cell Blocks in TFP looked strangely reminiscent of Sherlock’s Padded Wall Moriarty Prison (the jail where Sherlock locked up his emotions) is because Sherrinford is John’s jail where he locks up his gay feelings. He wants to break free (from the jail). He allowed himself to see Sherlock’s emotions for 5 minutes before dismissing them (then they died). His sister is there (Gay Island). Whereas Sherlock purposely retreated back into his heart to face his emotions for help, John is forcibly locked in (locked room-heart metaphor). The Gay is infectious and infiltrates his personal life to make Everything About Sherlock Always. Fight me on this.