I own over a hundred Lees and maybe half that many Marxman pipes and every Lee and most of the Marxmans had removable stingers. I own a couple of dozen Kaywoodie four hole stinger pipes with fixed, forever stingers-it was a selling point for Kaywoodie.
The classic stinger works so well I remove them and put them in drawers, except of course for the Kaywoodies.
The stinger acts as a mechanical filter to trap a small amount of water and tar. Each smoke requires a paper towel be used to wipe off the wet, brown residue.
I want all that tasty nicotine and tar in my mouth.
Kaywoodie used to claim the stinger lowered the temperature of the smoke entering the mouth. That stands to reason. It surely won’t make it hotter.
But after years of practice I think the smoker subconsciously controls the temperature of the smoke. Think of a stinger as training wheels.
The removable stingers were cheap to make , but they weren’t free. They required an extra step in manufacture.
I wonder if any new pipe today comes with a stinger?