Tobacco
The native pointed with pride to two doddering ancients hobbling painfully down the village street, and informed the stranger:
“Them fellers is the Dusenbury twins—ninety-eight year old!” The visitor was duly impressed, and asked to what the pair of venerable citizens attributed their long life.
“It’s kind o’ which and t’ other,” the native confessed. “Obadiah declares its all along o’ his chewin’ an’ smokin’ an’ snuffin’ day in an’ day out, fer nigh onto a hundred year; an’ Ebenezer declares he has his health becase he never touched the filthy weed.”