Why do we yaw?

or:Why do we yaw?or:I'm assuming you meant yawn, we yawn to get rid of excess carbon dioxide in our brain. However, it is unknown why yawning is con

or:Why do we yaw?

or:I'm assuming you meant yawn, we yawn to get rid of excess carbon dioxide in our brain. However, it is unknown why yawning is contagious.

or:Yaw in a boat is a sideways motion, and yaw in an airplane is a sideways motion, but yaw in a boat does not resemble yaw in an airplane. People made up that word because they have to talk about such things, and everybody they talk to knows what they mean.

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