Is it bad to bite your nails?

Yes because your nails are filled with all sorts of germs and when biting them all those germs and dirt go into your mouth

Agroup of engineering students from purdue university reported that its licking machine, modeled after a human tongue, took an average of 364 licks to get to the center of a tootsie pop. twenty of the group's volunteers assumed the licking challenge-unassisted by machinery-and averaged 252 licks each to the center.