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Where did you get those raisins on your fingers?

The epidermis, the outer layer of the human integument, is covered with a protective oil, called sebum. Sebum is secreted by the sebaceous glands in the skin and acts as a lubricant, giving the skin a somewhat solvent-resistent quality. Sebaceous glands are not found in the epidermis of the palms or the feet. When your fingers have been in a wet environment for an amount of time sufficient for the sebum to be washed away, the outer layer of skin begins to absorb water through osmosis. This extra moisture waterlogs the epithelial layer of the skin, causing some places to become protuberant, making wrinkles that somewhat resemble 'raisins' on your fingers. Your fingers are not, in fact, shriveled.

Don't worry... they won't stay that way.

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