LotR Cast Commentary- Teeth
(During Smeagol's transformation into Gollum)
Dom: It's good, this part, for Andy, because he was able to use his real teeth and his real nails for this. He does actually have grotesque teeth. Most Englishmen do. Scotsmen, on the other hand have textbook teeth.
Billy: Yeah, we use them for biting haggis and also for helping to chew the ends off our kilts.