A new study indicates brain temperature causes yawning. rode on the sailboat then yawn alot during evening... Alot of air into your brain. 🙂 - added 06/04/2014 - by Dottie86 I guess people really do blow off steam. - added 05/31/2014 - by kslowery If that's true, then my red-headed, hot-tempered daughter would yawn all the time LOL!!! - added...
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