11.   In fact, they had fewer reasons to bite their nails over the course of the century.

12.   Stop biting your nails!

13.   They are biting their nails, glancing from their consoles to the countdown clock.

14.   You overeat, smoke, drink, bite your nails etc.

15.   Both sisters bit their nails as children.

16.   Some people bite their nails when they feel nervous.

17.   A few months before the wedding is also a good time to start a nail and skincare regime, particularly if you bite your nails or have problem skin.

18.   Yeah I never bite my nails.

19.   Stop biting your nails Sue!

20.   And tenants sit on the sidelines, biting their nails.