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 to ease her nervousness.  She did, and soon her fingernails were growing normally.

One day her friend stopped her and -- noticing her well long, groomed nails -- 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."