Story by Italian writer Agnolo Firenzuolo (1493-1543)
A porcupine and a fox were returning from a great battle.
“Why wear that armour of spines?” said the fox. “The fighting is over.”
Thus beguiled, the porcupine took off his armour and the fox promptly pounced on him and devoured him.
Moral: Beware of advice from those who have their own interests at heart.