I've never bitten my nails, and never understood why people would want to. I mean, has anyone cut that little bit too short with clippers - it bloomin hurts!, who would want to inflict that on themselves
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The only think I chew off are those little strips of skin you get at the sides and top of your nail, but more often than not, you bite it, pull your finger away and it tears a strip of skin all the way up to your armpit. Owwwwwww!.
Use nail clippers, you bloody cave-men!
Without sounding too metro-sexual, neat fingernails are fairly important to women, they notice stuff like that right away. Ohh, and it's bad luck to cut your nails on a Sunday, so just don't.