what hold the man defending himself secures, the pain in his scalp will cause him to let go of that hold in order to escape further pain from having his hair pulled strongly.
Once the student has acquired this trick, he is encouraged to find out in what other ways a grip on an adversary's hair, whether at either side or from the rear, may be made painful, and just how the hand not employed in seizing the hair may be utilised in attacking some other vulnerable point. The assailant must always bear in mind, however, that the attacked opponent has two hands and, possibly, a knee that he can use. It will be interesting for the student to study out all possible forms of attack in the hair-pulling tricks, and to plan counters to each of these forms of assault. In friendly contest, it is necessary, at first, to do no more than to study all possible holds. The hair need not be wrenched to the point of absolute pain; but after a while it will be learned that this work toughens the scalp and renders the student more and more impervious to pain when so attacked. In time, if sufficient of this work is carried on, the practicer of jiu-jitsu
