When I was in 1st grade I fell and hit two of my teeth on a bar and killed them, meaning that they tuned brown. lack if calcium, maybe? I never really understood it.
Anyways, since they hurt for a bit after that I starred to get bad at brushing, and this gave me a few early cavities and pissed my dad off because it cost money. So then he would hold me down and scrub my teeth and it was very badly traumatized me. I cant even be in the same room as someone brushing because it will give me a horrible panic attack. I have to turn away and hold my ears if I see somebody brushing in TV.
So my teeth got worse and worse and then I got them all removed.
Childhood trauma can really wreck a persons life. Watch what you do to your kids.