You're thinking of "Piano Man", by Billy Joel.
The poem I was thinking of was:
“Don’t let the door hitcha’
Where the Good Lord splitcha’”
More of just a silly couplet, rather than a full poem.
I just have a habit of speaking in multi-layered non and semi - sequiturs.
Or as Prince Rogers Nelson put it in his tender love ballad titled “The Pope” .....
“I like to think of unpredictable licks.” (Followed by three unmodulated randomly keyed chords.)
But thanks anyway for putting bread in my jar.
(Man! ... What am *I* doin’ here?)