Why am I barking?

Is this tail-wagging, barking little dog saying:

a) come in here and I will bite your legs off;

or b) come in here and give me a cuddle;

or c) I have not decided whether to eat you or lick you yet but come in here anyway?

It's b of course! How could he bite my legs off? He is just over one foot tall and I am five foot nine! If you thought a) or c) you are rather silly. He is happily wagging his tail*.

He is nothing like the person in this awesome clip: http://www.youtube.com/watch?v=kNKSzmM44gE

* although that in itself is not always an indication that the dog is not going to use his little teeth, but the restof his posture says 'O.K.'