LadyoftheManor you have one child, a toddler, and are pregnant with your second.
Imagine that your child is born perfect, normal weight and so on. But doesn't feed or gain weight. You run from doctor to doctor to doctor and eventually get a diagnosis which cutting a long story short means that your child can't digest long chain protein.
That child is put on special formula, which is broken down (hydrolised sp?) into basically amino acids so that the child's body doesn't have to do any work to digest it. This formula also has sugars in it to provide all your child needs and do make it more palatable, and because it's been developed for PKU children it has to be sweetened with pure sugar as children with PKU can't have sweetners.
You then go through 4 years of hell - child can hardly eat anything, all food has to be cooked from scratch so you know what's in it, special bread, special pasta, no biscuits, no chocolate, no sweets because the child actually medically CANNOT HAVE THEM.
But the teeth rot out of their head because the supplements that they have to have to give them the nutrients they need to survive are going to destroy their teeth.
And then have someone with no knowledge of the situation and who isn't a dentist or specialist consultant tells you that your child has bad teeth because they had sweets or didn't brush their teeth.