I own this really bad/annoying quirk that i necessitate to break!?
Answers: I've done like thing. Try chewing gum or something. If you buy sugarless, it won't rot your teeth. Also try tapping your foot or something. You probably bite your nail when you're nervous or bored..
you can buy special nail peter out which makes your nails aroma disgusting, also you could maybe go for a manicure because once your nail look nice then you wouldnt want to ruin them