 It cannot be said that the sexual organs of either sex under the influence of sexual excitement are esthetically pleasing; they only become emotionally desirable through the parallel excitement of the beholder.When the absence of parallel excitement is accompanied in the beholder by the sense of unfamiliarity as in childhood, or by a neurotic hypersensitiveness, the conditions are present for the production of intense "horror feminae" or "horror masculis", as the case may be.It is possible that, as Otto Rank argues in his interesting study, "Die Nacktheit in Sage und Dichtung," ["sic"] this horror of the sexual organs of the opposite sex, to some extent felt even by normal people, is embodied in the Melusine type of legend.