Not particularly new. There were natural spas in Turkey where people went for that, and have been going for that for centuries---not chewing, nibbling, as I understand---but I don't know where to dig for it now.
Um. No. There's a reason I don't like swimming in lakes and such. I don't like things nibbling at me (or considering where I'm from, big things trying to eat me). In the ocean, if something brushes against me - I freak. So, voluntarily going to let fish nip at my heels? No. *shudder* Now, I'm gonna have nightmares.
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Ummmmm...Florida? Alligators?
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