Why do people yawn? What's the purpose?

To bring oxygen to your brain

kelbat on January 2, 2010, 3:24 am

Lack of oxygen

lillasie on January 2, 2010, 3:25 am

Can't we just breath?

qnzkingpimp on January 2, 2010, 3:26 am

So people on oxygen don't yawn?

kelbat on January 2, 2010, 3:27 am

People yawn because its the way your body telling u, that u need sleep or nap.

Aiyayah on January 2, 2010, 3:36 am

Bordom

fredabazemore on January 2, 2010, 3:53 am

Yawning gives ur brain the boost of o2 to wake up. Ur all right

lillasie on January 2, 2010, 4:38 am

Give oxygen to or cool off ur brain

David650 on January 2, 2010, 7:37 am