Off on a tangent, how about Tom Lehrer's "The Old Dope Peddler"?

When the shades of night are falling
Comes a fellow everyone knows
It's the old dope peddler
Spreading joy wherever he goes

Ev'ry evening you will find him
Around our neighborhood
It's the old dope peddler
Doing well by doing good

He gives the kids free samples
Because he knows full well
That today's young innocent faces
Will be tomorrow's clientele

Here's a cure for all your troubles
Here's an end to all distress
It's the old dope peddler
With his powdered happiness