Of late, I realised, Chocolates are not the only stuff that are responsible for tooth decay.
Nature wasn't a little fair in my case... I had to get my wisdom tooth extracted (both sides) on the lower half, due to decay. May be this isn't common ailment, to know of the problem I am talking about, please visit .. http://www.webmd.com/oral-health/wisdom-tooth-extraction
or google for "Wisdom tooth extraction".
This write-up is not to scare anyone, visit a dentist periodically to diagonise problems early and avoid painful procedures. I thank god, for giving rest of good health in all other means.