H. T., a homosexual chemist by profession, who has a theoretic interest in psychoanalysis, writes me: “The contribution that I am able to make may be of some use to you. I have often tried to think whether dreams have had any influence upon the development of my sexual life. But I could recall no experience which I could correlate to my condition. I have felt early an interest in the _membrum virile_ and this interest abides with me to this day. The sight of the penis in a state of erection is enough to rouse in me the strongest feelings of pleasure. While walking on the street I always try to observe the respective region in passers-by and I try to estimate the size of the organ by outward appearances,—my fancies are full of such reflections. I have always masturbated in front of the mirror watching my penis during the act. But it took a very long time for me to overcome my shyness enough to find companions for these acts. A few days ago I had a dream in which I saw my father who has been dead for ten years. He was the best man in the world, but unfortunately a periodic drinker. When in the inebriate state he treated mother very roughly. I dreamed a scene which scared me so that I awoke. I saw my father give me in hand his _membrum erectum_. And suddenly there flashed through my mind the recollection that he had done repeatedly this very thing when he was drunk. But with every fibre of my being I cling to my mother who is for me the ideal of womanhood such as I shall never again find the equal of in all this world! Beyond that my love is directed only to the male and specifically I am attracted to common men. Can you explain my riddle? I feel myself attracted to ordinary drivers, men of vulgar tastes such as one finds in the dram shops. Only once was I able to have intercourse with a girl. I was so “soused” at the time that I then did something which I could never carry out while in my ordinary senses....” I emphasize once more: The outbreak of heterosexual excitations after indulgence in alcohol proves the presence of that tendency and shows that under ordinary conditions the heterosexual tendency, though continually present, is subjected to suppression. The tendency is preserved in some closed-in compartment of the soul, the door to which may gape open under certain circumstances. Occasionally alcohol acts as a master key which opens up every enclosure.