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!