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 and then 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!