The back molar of my lower teeth on the right decayed in my twenties. I had its cavity filled twice in our local hospital. Before long it almost outlived its usefulness and reduced to a few tiny pieces. Since then I have been using my molars on the left alone. But not long ago I seemed to have overused them when I ate some hardy leaves of dandelion collected on the terrace behind our house. Then my gum around the lower molars got swollen and sore for several days during which I had great difficulties in chewing because they failed to function as before. After that my gum there was painful as soon as I ate something hard. And consequently my dining was greatly affected. It never occurred to me until now that I have been old.