[ Sherlock can sympathise to some extent; while he doesn't have super-senses, exactly, he certainly has a super-active brain which is more or less impossible to shut off. Imagining that doubled, tripled, quadrupled - whatever - is dizzying in and by itself. Anything else, asks the kid with the curious, curious biological set-up and yes, in fact, there is one thing he'd like to know and quickly now: ]

You're above averagely intelligent. A great deal, too. Why do you keep mixing up the English language with things like t-h-x - [ Yes, he's spelling out the letters here. ] - or - what was it now, b-t-...dubs? Will you grow out of it? Must I wait for you to do so?

[ Yes, he doesn't much care about the swearing, Peter, but this particular affliction of yours is making his ears bleed. ]