Again, got nothing to do with hiding. Got everything to do with living with the pipe, and not biting the hand that feeds you.
Jeeze, what's the best way to say this. Let's see: Smoke pipe slow means good long flavorful smoke. Smoke pipe fast means tongue bite, palate scorching, loss of flavor, hot pipe, charred rim, clouds of smoke like the house is on fire, no taste, no flavor, pain, and early death. And clenching is the gate keeper.
They use to print this stuff on the brochures that came with new pipes. I still have these original boxes and instructions from Comoy. Alfred Dunhill used to call it The Gentle Art of Pipe Smoking.