The funny thing is Mary said this to john in the empty hearse. John-"I don't shave for Sherlock Holmes" Mary-" you Gould put that on a t-shirt" coincidence or a catch phrase Mary first heard somewhere else?
But John could. When John married Mary, he very effectively killed a part of Sherlock. Funny thing about this show, it really knows how to kill you on the inside.<< You can't kill Sherlock physically, but you can kill him mentally.