Henry Havelock Ellis (2 February 1859 – 8 July 1939) was an English physician, eugenicist, writer, progressive intellectual and social reformer who studied human sexuality. He co-wrote the first medical textbook in English on homosexuality in 1897, and also published works on a variety of sexual practices and inclinations, as well as on transgender psychology. He developed the notions of narcissism and autoeroticism, later adopted by psychoanalysis.

Ellis was among the pioneering investigators of psychedelic drugs and the author of one of the first written reports to the public about an experience with mescaline, which he conducted on himself in 1896. He supported eugenics and served as one of 16 vice-presidents of the Eugenics Society from 1909 to 1912.

Early life and career Ellis, son of Edward Peppen Ellis and Susannah Mary Wheatley, was born in Croydon, Surrey (now part of Greater London). He had four sisters, none of whom married. His father was a sea captain and an Anglican, while his mother was the daughter of a sea captain who had many other relatives that lived on or near the sea. When he was seven his father took him on one of his voyages, during which they called at Sydney, Australia; Callao, Peru; and Antwerp, Belgium. After his return, Ellis attended the French and German College near Wimbledon, and afterward attended a school in Mitcham.

In April 1875, Ellis sailed on his father's ship for Australia; soon after his arrival in Sydney, he obtained a position as a master at a private school. After the discovery of his lack of training, he was fired and became a tutor for a family living a few miles from Carcoar, New South Wales. He spent a year there and then obtained a position as a master at a grammar school in Grafton, New South Wales. The headmaster had died and Ellis carried on at the school for that year, but was unsuccessful.

Medicine and psychology Ellis returned to England in April 1879. He had decided to take up the study of sex and felt his first step must be to qualify as a physician. He studied at St Thomas's Hospital Medical School, now part of King's College London, but never had a regular medical practice. His training was aided by a small legacy and also income earned from editing works in the Mermaid Series of lesser known Elizabethan and Jacobean drama. He joined The Fellowship of the New Life in 1883, meeting other social reformers Eleanor Marx, Edward Carpenter and George Bernard Shaw.

The 1897 English translation of Ellis's book Sexual Inversion, co-authored with John Addington Symonds and originally published in German in 1896, was the first English medical textbook on homosexuality. It describes male homosexual relations. Ellis wrote the first objective study of homosexuality, as he did not characterise it as a disease, immoral, or a crime. The work assumes that same-sex love transcended age taboos as well as gender taboo. The work also uses the term bisexual throughout. The first edition of the book was bought-out by the executor of Symonds's estate, who forbade any mention of Symonds in the second edition.

In 1897 a bookseller was prosecuted for stocking Ellis's book. Although the term homosexual is attributed to Ellis, he wrote in 1897, "'Homosexual' is a barbarously hybrid word, and I claim no responsibility for it." In fact, the word homosexual was coined in 1868 by the Hungarian author Karl-Maria Kertbeny.

Ellis may have developed psychological concepts of autoeroticism and narcissism, both of which were later developed further by Sigmund Freud. Ellis's influence may have reached Radclyffe Hall, who would have been about 17 years old at the time Sexual Inversion was published. She later referred to herself as a sexual invert and wrote of female "sexual inverts" in Miss Ogilvy Finds Herself and The Well of Loneliness. When Ellis bowed out as the star witness in the trial of The Well of Loneliness on 14 May 1928, Norman Haire was set to replace him but no witnesses were called.

Eonism Ellis studied what today are called transgender phenomena. Together with Magnus Hirschfeld, Havelock Ellis is considered a major figure in the history of sexology to establish a new category that was separate and distinct from homosexuality. Aware of Hirschfeld's studies of transvestism, but disagreeing with his terminology, in 1913 Ellis proposed the term sexo-aesthetic inversion to describe the phenomenon. In 1920 he coined the term eonism, which he derived from the name of a historical figure, the Chevalier d'Éon. Ellis explained:

Ellis found eonism to be "a remarkably common anomaly", and "next in frequency to homosexuality among sexual deviations", and categorized it as "among the transitional or intermediate forms of sexuality". As in the Freudian tradition, Ellis postulated that a "too close attachment to the mother" may encourage eonism, but also considered that it "probably invokes some defective endocrine balance".

Havelock Ellis used literary examples from Balzac and several French poets and writers to develop his framework to identify sexual inversion in women.

Marriage

In November 1891, at the age of 32, and reportedly still a virgin, Ellis married the English writer and proponent of women's rights Edith Lees. From the beginning, their marriage was unconventional, as Lees was openly lesbian. At the end of the honeymoon, Ellis went back to his bachelor rooms in Paddington. She lived at a Fellowship House in Bloomsbury. Their "open marriage" was the central subject in Ellis's autobiography, My Life. Ellis reportedly had an affair with Margaret Sanger.

According to Ellis in My Life, his friends were much amused at his being considered an expert on sex. Some knew that he reportedly suffered from impotence until the age of 60, when he discovered that he could become aroused by the sight of a woman urinating. Ellis named this "undinism". After his wife died, Ellis formed a relationship with a French woman, Françoise Lafitte (better known as Françoise Delisle).

Eugenics

Ellis was a supporter of eugenics. He served as vice-president to the Eugenics Education Society and wrote on the subject, among others, in The Task of Social Hygiene:

In his early writings, it was clear that Ellis concurred with the notion that there was a system of racial hierarchies, and that non-western cultures were considered to be "lower races". Before explicitly talking about eugenic topics, he used the prevalence of homosexuality in these 'lower races' to indicate the universality of the behavior. In his work, Sexual Inversions, where Ellis presented numerous cases of homosexuality in Britain, he was always careful to mention the race of the subject and the health of the person's 'stock', which included their neuropathic conditions and the health of their parents. However, Ellis was clear to assert that he did not feel that homosexuality was an issue that eugenics needed to actively deal with, as he felt that once the practice was accepted in society, those with homosexual tendencies would comfortably choose not to marry, and thus would cease to pass the 'homosexual heredity' along.

In a debate in the Sociological Society, Ellis corresponded with the eugenicist Francis Galton, who was presenting a paper in support of marriage restrictions. While Galton analogized eugenics to breeding domesticated animals, Ellis felt that a greater sense of caution was needed before applying the eugenic regulations to populations, as "we have scarcely yet realized how subtle and far-reaching hereditary influences are." Instead—because unlike domesticated animals humans control whom they mate with—Ellis argued that a greater emphasis was needed on public education about how vital this issue was. Ellis thus held much more moderate views than many contemporary eugenicists. In fact, Ellis also fundamentally disagreed with Galton's leading idea that procreation restrictions were the same as marriage restrictions. Ellis believed that those who should not procreate should still be able to experience all the other benefits of marriage, and not to allow those was an intolerable burden. This, in his mind, was what led to eugenics being "misunderstood, ridiculed, and regarded as a fad".

Throughout his life, Ellis was both a member and later a council member of the Eugenics Society. Moreover, he played a role on the General Committee of the First International Eugenics Congress.

Sexual impulse in youth Ellis's 1933 book, Psychology of Sex, is one of the many manifestations of his interest in human sexuality. In this book, he goes into vivid detail of how children can experience sexuality differently in terms of time and intensity. He mentions that it was previously believed that, in childhood, humans had no sex impulse at all. "If it is possible to maintain that the sex impulse has no normal existence in early life, then every manifestation of it at that period must be 'perverse, he adds.

He continues by stating that, even in the early development and lower functional levels of the genitalia, there is a wide range of variation in terms of sexual stimulation. He claims that the ability of some infants to produce genital reactions, seen as "reflex signs of irritation," is typically not vividly remembered. Since the details of these manifestations are not remembered, there is no possible way to determine them as pleasurable. However, Ellis claims that many people of both sexes can recall having agreeable sensations with the genitalia as a child. "They are not (as is sometimes imagined) repressed." They are, however, not usually mentioned to adults. Ellis argues that they typically stand out and are remembered for the sole contrast of the intense encounter to any other ordinary experience.

Ellis claims that sexual self-excitement is known to happen at an early age. He references authors like Marc, Fonssagrives, and Perez in France, who published their findings in the nineteenth century. These "early ages" are not strictly limited to ages close to puberty, as can be seen in their findings. These authors provide cases for children of both sexes who have masturbated from the age of three or four. Ellis references Robie's findings that boys' first sex feelings appear between the ages of five and fourteen. For girls, this age ranges from eight to nineteen.

For both sexes, these first sexual experiences arise more frequently during the later years as opposed to the earlier years. Ellis then references G. V. Hamilton's studies that found twenty percent of males and fourteen percent of females have pleasurable experiences with their sex organs before the age of six. This is only supplemented by Ellis's reference to Katharine Davis's studies, which found that twenty to twenty-nine percent of boys and forty-nine to fifty-one percent of girls were masturbating by the age of eleven. However, in the next three years after, boys' percentages exceeded those of girls.

Ellis also contributed to the idea of varying levels of sexual excitation. He asserts it is a mistake to assume all children are able to experience genital arousal or pleasurable erotic sensations. He proposes cases where an innocent child is led to believe that stimulation of the genitalia will result in a pleasurable erection. Some of these children may fail and not be able to experience this, either pleasure or an erection, until puberty. Ellis concludes, then, that children are capable of a "wide range of genital and sexual aptitude". Ellis even considers ancestry as a contribution to different sexual excitation levels, stating that children of "more unsound heredity" or hypersexual parents are "more precociously excitable".

Auto-eroticism