Q. What can be done to stop a 19-year-old from biting his fingernails? This has been an ongoing habit from early childhood. He’s obviously damaging his fingers and maybe even his teeth. Verbal ...

You matched with this amazing person on a dating app. He is a 10, but as you head to the cafe to meet him, he is biting his nails. The chances are you might flee the scene, and unmatch instantly. Nail ...

Nail biters want to know. Nail biters want to know. Credit...Elizabeth Renstrom for The New York Times Supported by By Jennifer Hussein No matter your algorithmic preferences, if you’re scrolling ...