Do you bite your nails? For 30 years, I did. We nail biters can be "pathological groomers" — people for whom normal grooming behaviors, like skin picking or hair pulling, have become virtually ...

You’re not alone if you find some “bad” habit weirdly satisfying: freeing an ingrown hair, plucking a stray gray, popping a pimple, gnawing off a pesky hangnail, or whatever else you might do in the ...