"Beware of shaking hands with a sterkarm!" Goes the folk saying. Why the warning? The members of this wild 16th-century Scottish clan are left-handed, and while they smile and offer the right hand, the left wields a dagg..."Beware of shaking hands with a sterkarm!" Goes the folk saying. Why the warning? The members of this wild 16th-century Scottish clan are left-handed, and while they smile and offer the right hand, the left wields a dagger.