Your lips are one of the most sensitive parts of your body.
You taste with your tongue.
So your mouth is an important part of your senses.
And although your teeth are not part of the senses you can do a funny game with it.
Do you also grind your teeth when you are worried about something?
This mouth does too.
Just pull the teeth from left to right to read how this person is feeling.
One time he or she is feeling: 'prima'', the other time: 'uitstekend' or some other Dutch words..
They all mean: 'Just fine'.