Interview with Steven Moffat, Benedict and Sue Verue.

www.geeksugar.com/Sherlock-Benedict-Cumberbatch-interview-23065782

There are a couple  of funny bits in this, amongst which are:
'Sue: Sherlock to me feels like a Great Dane, you know, those dogs where that legs are too big.
Benedict: Yes! Yes! Except, more like a meerkat, or a hybrid between a meerkat and a Great Dane. A Great Dane on speed. A Great Dane that's just had a bowl of coffee.'
And
'Benedict: Is John a hedgehog? I haven't seen the hedgehog. When did that happen? Is it due to Martin's hair? Because if it is , I'll be really happy about that.'