This appears at the first glance a non-sexual sleep walking. This is only however in its first appearance, although it is to be regretted that the full explanation can scarcely be given in the absence of any analysis. It is first to be noted that sleep walking sets in at puberty and is ushered in by anxiety dreams, pollutions and various anxiety equivalents. The hammering in the arteries, the roaring in the ears, the restless, disturbed nights, as well as the unusually disturbed days, we know these all as manifestations of an unsatisfied libido. The first "frightful" anxiety dream seems to lead deeper, as well, as the "horrible suffering" started by a hand, which he felt upon his body. Must not this hand, which causes this "horrible suffering" to the youth who had never yet known trouble, have touched his genitals?[17] Behind this perhaps, moreover, are very early memories of the care bestowed upon the nursing infant and the child. [17] One may also think of the fear of castration, associated with the threats of parents so very frequently made when children practice masturbation. The terror which fell upon him every time that he walked in his sleep is worthy of note, for he was not otherwise easily frightened. "A terror which I could not describe," "fear of that dreadful thing" and fear not merely of the ridicule of his fellows but of something, what, he never knew, which is a far more violent reaction than we have been accustomed to find with sleep walkers. This excessive reaction may be very well understood, however, if behind it a particularly inacceptable sexual factor hides itself. Finally the cure by means of the mother's balls of yarn, homely proof of her love, doubtless has to do with the erotic. It must be admitted to be sure that we have to confine ourselves to mere conjectures. Only one may well maintain that even an apparently non-sexual case soon reveals its sexual grounding. Moreover, a strong muscle erotic is demonstrated further throughout Ganghofer's autobiography.