I figure Sherlock’s curls are literally the number one priority in this show.
OF COURSE THE CURLS ARE THE PRIORITY!!
I have this theory that if Sherlock shaved his head then he would lose all of his deductive powers. It’s all in the hair.
Like Sampson losing his strength when Delilah cut his hair off.
Now there’s an idea for a fanfic surely? John shaves off Sherlocks hair for a laugh and then discovers he can’t solve cases without it. Or something.