How did the chaser get a correct answer for saying to the question What part of your body is your neb and he answered mouth .Sticking your neb in in Scotland is sticking your nose in - interfering with something.
I've not heard of "neb" meaning mouth before and Chambers Dictionary online shows
"neb Scots & N Eng noun 1 a beak or bill. 2 the nose. 3 the sharp point, or a projecting part, of something. verb (nebbed, nebbing) intrans to look around in a nosey way with the hope of seeing something to gossip about.
ETYMOLOGY: Anglo-Saxon nebb beak or face."
Back to the OP... Mouth doesn't appear to be wrong, it seems a valid answer. Nose seems valid too. If it had been Millionaire and one of the two had been classed as 'wrong', that would have been unfair to me.
It depends where it goes - are you waking up as a nation to the pleasure of oral sex - and using your nose and chin? Good God, there may be a revolution on the cards - bless you, Nicola.