. . .the best medicine. . .
"He wouldn't tell you your coat's on fire." - relic of pipe smoking days when the briar would absent mindedly be parked in the pocket, still with an ember.
and a corollary - "You wouldn't piss on him if he was on fire."
Yank walking down Todd Street, main drag Alice Springs, says to local - "You know what this place is fella? This is the arsehole of the world." "Yairs mate - you just passing through?" (Think nasal twang).