Just Smile!
   
   Smiling is infectious,
   you catch it like the flu,
   When someone smiled at
   me today, I started smiling too.
   
   I passed around
   the corner, and someone saw my grin -
   When he smiled I realized, I'd passed it on to him.
   I thought about
   that smile, then I realized its worth,
   A single smile, just like
   mine, could travel round the earth.
   
   So, if you feel a smile
   begin, don't leave it undetected -
   
   Let's start an epidemic
   quick and get the world infected!
   
   author unknown