In the course of cultural development it finally happened that so much godliness and holiness had been extracted from sexuality that the exhausted remnant fell into contempt. But considering the indestructibility which is in the nature of all psychic impressions one need not wonder that even the most primitive forms of genital worship could be demonstrated until quite recent times, and that language, customs and superstitions of present day humanity contain the remnants of all phases of this course of development.[38] Important biological analogies have taught us that the psychic development of the individual is a short repetition of the course of development of the race, and we shall therefore not find improbable what the psychoanalytic investigation of the child's psyche asserts concerning the infantile estimation of the genitals. The infantile assumption of the maternal penis is thus the common source of origin for the androgynous formation of the maternal deities like the Egyptian goddess Mut and the vulture's "coda" (tail) in Leonardo's childhood phantasy. As a matter of fact, it is only through misunderstanding that these deistic representations are designated hermaphroditic in the medical sense of the word. In none of them is there a union of the true genitals of both sexes as they are united in some deformed beings to the disgust of every human eye; but besides the breast as a mark of motherhood there is also the male member, just as it existed in the first imagination of the child about his mother's body. Mythology has retained for the faithful this revered and very early fancied bodily formation of the mother. The prominence given to the vulture-tail in Leonardo's phantasy we can now translate as follows: At that time when I directed my tender curiosity to my mother I still adjudged to her a genital like my own. A further testimonial of Leonardo's precocious sexual investigation, which in our opinion became decisive for his entire life. A brief reflection now admonishes us that we should not be satisfied with the explanation of the vulture-tail in Leonardo's childhood phantasy. It seems as if it contained more than we as yet understand. For its more striking feature really consisted in the fact that the nursing at the mother's breast was transformed into being nursed, that is into a passive act which thus gives the situation an undoubted homosexual character. Mindful of the historical probability that Leonardo behaved in life as a homosexual in feeling, the question obtrudes itself whether this phantasy does not point to a causal connection between Leonardo's childhood relations to his mother and the later manifest, if only ideal, homosexuality. We would not venture to draw such conclusion from Leonardo's disfigured reminiscence were it not for the fact that we know from our psychoanalytic investigation of homosexual patients that such a relation exists, indeed it really is an intimate and necessary relation.