Editing Algolagnia (section)

==History of research==
In 1892, [[Albert von Schrenck-Notzing]] introduced the term algolagnia to describe "sexual" [[masochism]], to differentiate it from [[Charles Féré]]'s earlier term called "algophilia"; Schrenck-Notzing's interpretation was that algolagnia involved ''[[lust]]'', not ''love'' as Fere interpreted the phenomenon.<ref name="forens"/> (It should be cautioned, though, that the definitions regarding sadism and masochism as medical terms have changed over the years (as also noted in the main article for that topic) and are still evolving,<ref name="forens" /> and there are also non-medical definitions of [[sadomasochism]].) However, Krafft-Ebing's theories in [[Psychopathia Sexualis (Richard von Krafft-Ebing book)|''Psychopathia Sexualis'']] – where the terms sadism and masochism were used – were adopted by Sigmund Freud and became an integral part of [[psychoanalysis]], thereby ensuring their predominance over the concept of "algolagnia".

The neurologist Albert Eulenberg was another one of the first researchers to look into algolagnia,<ref name="forens" /> in the 1902 ''Sadismus und Masochismus'' (Sadism and Masochism). Soon thereafter, [[Havelock Ellis]] also looked into algolagnia, in the early 1900s, and stated "Sadism and Masochism – Algolagnia Includes Both Groups of Manifestations"<ref name="guten"/> but maintained that enjoyment of pain was restricted to an erotic context,<ref>Ellis, Havelock. 1967; first published 1939. My Life London: Spearman.</ref> in contrast to Krafft-Ebing's interpretations. With such titles as ''Analysis of the Sexual Impulse, Love and Pain, The Sexual Impulse in Women'' and ''The Evolution of Modesty, The Phenomena of Sexual Periodicity, Auto-Erotism'', Ellis described the basics of the condition. [[Eugen Kahn]], [[Smith Ely Jelliffe]], [[William Alanson White]], and [[Hugh Northcote]] were other early psychological researchers into algolagnia.