Children say what they see.
All through childhood, my dentist would say what lovely teeth I had. Presumably, she meant that they were very healthy.
They have always been a creamy-yellow colour, though, not white, and this was once pointed out to me very matter-of-factly by a seven-year-old.
When I was in my fifties, a three or four year old asked me why I have such 'big' teeth (or it might have been 'long').
With hindsight, I should have replied, "All the better for eating you with!" I didn't - I just explained that that's just how they had grown.
I'm still waiting for one to ask me why I have fangs!
Due to a smallish mouth, but far too many teeth (I still have all four wisdom teeth, though one can't quite fully erupt, probably due to lack of space), my teeth are now very crooked too. I hate them, but the cost of treatment means that I am stuck either them as they are.
It's sometimes struck me that maybe if I hadn't looked after my teeth so well when I was younger, I would have fewer of them by now and that the remaining ones might at least have remained reasonably straight. There's no justice in this world!