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 it's 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
John Leroy Maxwell
http://www.poemhunter.com/poem/smile-day-pass-it-on/