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.'