Why is yawning contagious?

[borris]

please explain

 

[KillahBee]

stfu n00b

 

[puddlemonkey]

please explain

Its not so much that it is contagious, its just a reaction we all have to reading KBs posts.

 

[rnch]

Its not so much that it is contagious, its just a reaction we all have to reading KBs posts.

SO true!

 

[yonkers weights]

Its not so much that it is contagious, its just a reaction we all have to reading Puddle's posts.

 

[samoth]

*yawns*

 

[yonkers weights]

*Yawn*
I just did it, now you.

 

[Gymgurl]

So why is it?

 

[musclemom]

The short answer is: Nobody knows, seriously.

 

[MichaelScott]

ask the mythbusters