We've all been taught that there are certain habits that we just shouldn't follow. I, for example, am a perpetual nail-biter. Though I am constantly being hounded by family and friends to stop, try as I might, I just can't help it! Every time I get nervous or stressed, I'll suddenly look down and find that my nails have somehow been bitten to the quick. Oops!
But as it turns out, while nail biting might not be the best practice, it can actually boost your immune system. And that's not the only bad habit that has some surprising benefits. Check out more below: