Redbeard?

iwantthatcoat:

Curious what everyone thinks Redbeard is all about.
My guess is it’s a pet.
Obviously Sherlock liked pirates and would have named a pet after a pirate. I am guessing it had something to do with love and denying that you love something (or, with Mycroft’s analogy… someone). His reaction was upsetting, embarrassing, a child’s reaction, and it hurt that Mycroft would go there…and one that seemed to go along with “good luck not being involved.” Maybe he was upset about a pet’s loss…or… (And this would no doubt piss him of) wanted something someone else had.