I don't like the sound of it, but I have to admit, it seems to work for some kids. My youngest nephew (2) was a biter, especially biting his brother (3 1/2) because the rest of us knew the warning signs and would stop it. One day my sister (not their Mum) bit him on the arm after he bit his brother, fairly gently but enough to make him realise that it hurts. He's never done it again thankfully! I think some kids only learn through experience.