看了这个，情绪会好一些不？

A young woman who was worried about her habit of biting her fingernails down to the quick was advised by a friend to take up yoga. She did, and soon her fingernails were growing normally. Her friend asked her if yoga had totally cured her nervousness. "No," she replied, "but now I can reach my toe-nails so I bite them instead.


http://www.flickr.com/photos/annienaka/3315289255