Five out of five dentists recommend listening to this episode, because there is as of yet no known mechanism for sound waves to cause tooth decay. Unless you lie around listening to the show for days on end without brushing your teeth, in which case we and our dentists recommend sugarless gum. Which, coincidentally, is one of two subjects we cover this week. The other is sugary gum.

Check out this episode

Oh, and here’s a link to “that picture of chewed gum”: