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Whenever I am excited or nervous I always bite my fingers...is it normal?
Older sister keeps her nails very long and polished. They're amazing. She has a habit of tapping her nails to her lips, and nibbling on either one or several nails. Just a habit she has that's also very fun to watch.
I do that too
It's a habit and habits die hard, It's unhealthy but a completely normal thing to do.