Australian Toothpaste

The other day when I was brushing my teeth I had a closer look at my toothpaste. I went through the list of features that were printed on the back of the tube. It says things like ' No animal testing' - good, ' contains Vitamin C' - can't harm. But on the top of the list - the best feature that this toothpaste has to offer - 'Sugar Free'. As far as I got told sugar is bad for our teeth, right? That's we be brush them... so why advertise a toothpaste with 'no sugar'? I better check that any other toothpaste I buy in the future also says 'contains no sugar', looks like this is not as obvious as I thought.