The tobacco enema was used to infuse tobacco smoke into a patient’s rectum for various medical purposes, primarily the resuscitation of drowning victims. A rectal tube inserted into the anus was connected to a fumigator and bellows that forced the smoke towards the rectum. The warmth of the smoke was thought to promote respiration, but doubts about the credibility of tobacco enemas lead to the popular phrase “blow smoke up one’s ass.”
“They all have double forward pleats, the kind that open towards the fly…”
Can’t find the original photographer to credit, but if anyone knows, hit it in the comments so I can credit it appropriately.