Really early work

Ok, this one is from high school. It's a silly bit of whimsy I jotted down while bored in class one day. Which class? How the hell should I remember?

Ode To The Garbage Can

You're round, and grey, and sometimes green,
And when I pass, you smell real mean.
What's left of lunch is what you hold,
And last night's dinner, now gone cold.
If we don't close the garage door,
The dog will knock you to the floor,
To get what's left of last week's food,
Except on Tuesday, when we empty you.

Is it wrong that I remembered the words to that without having to look it up?