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 they smiled I realized, I'd passed it on to them.

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 and get the world infected;)