system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: How come the skin on our hands and feet looks so old after swimming, while the rest looks the same?
gpt
The skin wrinkles like that due to a response from our brain to the water itself, when the skin on our hands and feet wrinkle in that manner it helps improve grip UNDER water, not so much out of water. We know this is a direct response by our body because there have been experiments done where they severed the nerves in a finger, and placed it under water, when they did that the finger with the severed nerve did not show the response to wrinkle as it could not communicate with the brain.