Why Yawning Is Contagious: You Yawn To Equalize The Pressure On Your Eardrums.

Home › Fortune Cookies › Miscellaneous Collections

Why Yawning Is Contagious: You yawn to equalize the pressure on your eardrums.
This pressure change outside your eardrums unbalances other people's ear
pressures, so they must yawn to even it out.
-- Omni

Related: