Topics of study include sexual development (puberty), sexual orientation, gender identity, sexual relationships, sexual activities, paraphilias, atypical sexual interests.
It also includes the study of sexuality across the lifespan, including child sexuality, puberty, adolescent sexuality, and sexuality among the elderly.
In England, the founding father of sexology was the doctor and sexologist Havelock Ellis who challenged the sexual taboos of his era regarding masturbation and homosexuality and revolutionized the conception of sex in his time.His seminal work was the 1897 Sexual Inversion, which describes the sexual relations of homosexual males, including men with boys.Foi inclusive acusado de sexólogo (naquela época isto era pejorativo) e tarado.O sentimento de solidão o acompanhou durante toda sua vida.(Prostitution in the City of Paris), an early 1830s study on 3,558 registered prostitutes in Paris, published by Alexander Jean Baptiste Parent-Duchatelet (and published in 1837, a year after he died), has been called the first work of modern sex research.
The scientific study of sexual behavior in human beings began in the 19th century.Ellis wrote the first objective study of homosexuality, (the term was coined by Kertbeny) as he did not characterize it as a disease, immoral, or a crime.The work assumes that same-sex love transcended age taboos as well as gender taboos.Its library housed over 20,000 volumes, 35,000 photographs, a large collection of art and other objects.People from around Europe visited the Institute to gain a clearer understanding of their sexuality and to be treated for their sexual concerns and dysfunctions.Seven of his twenty-one case studies are of inter-generational relationships.