And his name is . JOHN CENA ! <| sep |> That was really really bad <| sep |> I apologize if this comes off harsh , but this is unhygienic and dare I say gross yes i know you hopefully aren ' t brushing your teeth same brush , I really hope that anyway . 10 billion That ' s how many microbes live on your toothbrush at any given time . Toothbrushes can act as a lightning rod for bacteria , viruses and even what we call fungi or mold and mildew , Dr . Gerry Curatola , founder of Rejuvenation Dentistry and author of the book Smile For Life , Rejuvenation Dentistry and the Art of Wellness , told FoxNews . com . The types of bacteriacan range anywhere from the bacteria in the mouth that cause tooth decay and gum disease , to strep bacteria to E . coli . Get a proper hygienic tool designed for the affect you are seeking .