Acidic sweat could slowly leech the tanning chemicals from the leather. Him or her being naked isn’t necessary. More likely to happen somewhere warm and humid, though. Probably the US southeast, like Louisiana, Florida, or similar.
As much as I want this to be true, someone said it’s most likely just the tar and chemicals from a heavy smoker which darkened a light chair but your idea is cooler.
Acidic sweat could slowly leech the tanning chemicals from the leather. Him or her being naked isn’t necessary. More likely to happen somewhere warm and humid, though. Probably the US southeast, like Louisiana, Florida, or similar.
As much as I want this to be true, someone said it’s most likely just the tar and chemicals from a heavy smoker which darkened a light chair but your idea is cooler.