“Psychologists found that if you put a pencil between your teeth while reading something, you’ll think the material funnier.

That’s because your brain’s interpretation is influenced by the smile on your face.

If you sit up straight, instead of slouching, you’ll feel happier too!

The brain thinks “cheery” when the mouth and spine are doing what they’re doing!”  (Source:  Incognito: The Secret Life of the Brain by David Eagleman)