While this sounds super intriguing to a perpetual nail biter like myself, it could mean even more to someone suffering from trichotillomania, which is the obsessive-compulsive disorder in which people pull out their own hair (including brows and lashes, too). It affects about 4 percent of the population and can be embarrassing and problematic for those with the condition.

"The first step is being aware and bringing it to your attention... [Keen2] really is a brilliant idea."
–Howie Mandel on the Marcus Lemonis podcast