Never Smile At A Crocodile

Don't be taken in by his welcome grin
He's imagining how well you'd fit within his skin
Never dip your hat and stop to talk awhile
Never run, walk away, say good-night, not good-day
Clear the aisle but never smile at Mister Crocodile
You may very well be well bred
Lots ot etiquette in your head
But there's always some special case, time or place
To forget etiquette
It has been discovered that one simply cannot cherish an amicably or trustworthy relationship with the aforementioned species.
In addition: It is mandatory that one does not become irresistably drawn into the heironeous belief that the latteral open extension of his lips means you are entirely welcome.
Clear the aisle but never smile at Mister Crocodile