I am 41 years old and I take terrible care of my teeth. I can remember when I was younger ,I never used to brush my teeth, maybe twice a week, nowadays if I remember I brush once a day. But still, maybe only 3-4 times a week. I don't mind the odd sugar snack as well. Always had white teeth even though I don't brush.
But despite all of this, I have NEVER had a cavity or even had pain in my gums or teeth area.
So can you go through your entire life without cavity?