The tongue is the only muscle in the human body that never gets tired [talking].
![The tongue is the only muscle in the human body that never gets tired [talking].](http://cdn.quoteddaily.com/images/evan-esar/the-tongue-is-the-only-muscle-in-the-human-body-that-never-gets-tired-talking.jpg)
The tongue is the only muscle in the human body that never gets tired [talking].