Yeah... At my daughter's first appointment (age 2 1/2?) I was told that I didn't need to worry about flossing. At her 4th appointment... Age 5, they took x-rays for the first time and she had 2 cavities between her molars. I feel so bad that I didn't floss! I guess at 2 1/2 her teeth weren't touching anywhere, but apparently, if they touch, they need to be flossed.