Ohmigod. Is it contagious?!

Yawns are weird things.  I mean, all of a sudden, out of nowhere, we have to open our mouths and suck in some air, and we have no control over it.  What the hell?!  I mean, sure, we can try to stifle it, but that looks equally ridiculous.

 

And what's up with yawns being contagious?!  They're not contagious like a cold or the plague.  But they certainly seem to be contagious. That's just bizarre.  What could possibly be the evolutionary purpose for contagious yawns?  If one yawn spurs another person to yawn, thereby beginning a vicious cycle of yawn distribution, why aren't we continuously yawning?  If anything, that could lead to the destruction of the world!  Picture it:  The enemy is preparing its attack:  "We'll start a yawn chain and catch those darn good guys when they're at their weakest.  Mwa ha ha!"

 

And there are 2 ways to get you!  Silent yawns can make you yawn.  Someone yawns aloud, behind you?  Guess what?  You've been tagged!

 

 I remember a Garfield comic strip that showed the spreading of yawns among Garfield, Jon, and Odie (if memory serves!).  And I remember that it always made me yawn.  Yawns are so strange....

 

So, did I make you yawn?!