Could the interpretation of our patient be generalized, it might be said that the sleep walker climbs upon the roofs as a fulfilment of a childish wish to climb up into the very moon. It is of significance also how far we may consider universal her infantile belief that everything sexual is permitted upon the moon, that what was strongly forbidden her upon earth was there allowed to other children, and further the opinion that she was quite different because of her sexual phantasying and did not after all belong upon the earth but on the moon. At any rate the two motives introduced for staring at the moon's disk may be frequently met, are perhaps constantly present, that is the similarity of the moonlight and lamplight and the comparison of the moon's disk to the human body, especially the nates. Let us attempt to realize now what this case before us may have to teach, the first and so far the only one of its kind to be submitted to a careful analysis. It must naturally be candidly confessed from the start that from a single case history, be it ever so clearly and fully set forth, no general conclusions may be drawn. Moreover certain factors resist generalization because they are of a more specialized character and at most will only occasionally reappear, as for example, the strong sadistic note, the desire for blood, the hemoptysis of the beloved mother. More frequently, also with the female sex, there may be the wish to climb into bed with the parents or their substitutes, to play the rôle of mother or father, out of love for them, and finally in general homosexuality may be a driving factor. It is the sexual coloring and motivation of the sleep walking, especially by the light of the moon, which gives throughout the strongest tone to our case. This is something which the scientific authors have so far as good as completely overlooked, even where it has forced itself into view, as in a series of cases cited by Krafft-Ebing.[9] We shall hear, in discussing the works of the poets, that they and the folk place this very motive before all others, indeed often take it as the only one. We have here once more before us, if this opinion be correct, a scientific erotophobia, that is the dread--mostly among physicians and psychologists--of sexuality, although this is at least one of the chief driving instincts of human life.