Never Smile At a Crocodile

Never smile at a crocodile
No, you can't get friendly with a crocodile
Don't be taken in by his welcome grin
He's imagining how well you'd fit within his skin

Never smile at a crocodile
Never tip your hat and stop to talk a while
Never run, walk away, say goodnight, not goodday
Clear the aisle but never smile at Mister Crocodile

You may very well be well bred
Lots of etiquette in your head
But there's always some special case, time or place
To forget etiquette

For example
One positively must not wear a pleased expression on his countenance
When confronted with that large lizard-like amphibious reptile
Who has long jaws, armored skin and webbed feet and who is known as the crocodile
It has been discovered that one simply cannot cherish an amicable
Or trustworthy relationship with the a for mentioned species

In addition, it is mandatory that one does not become irresistible drawn into
The erroneous belief that the lateral open extension of his lips means that you're entirely welcome
It is much more reasonable to assume that he is contemplating how you would look in a lizard suit
His, hehe

Clear the aisle but never smile at Mister Crocodile