Well, apparently you do. Dentists and doctors have always emphasized that cleanliness is the key to good health. Proper hygiene with the body and the stuff you use on your body are essential to fight common ailments that plague most people. Toothbrushes are one of those implements that apparently needs regular sterilization for the mouth is one of the dirtiest parts of the human body. Some of the bacteria that come in food and the stuff we place in our mouth are quite harmless when they remain contained in the digestive tract which has the necessary protection to prevent them from causing harm.