Eugen Kahn, Smith Ely Jelliffe, William Alanson White, and Hugh Northcote were other early psychological researchers into algolagnia.
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In 1892, Albert von Schrenck-Notzing introduced the term algolagnia to describe "sexual" masochism, to differentiate it from Fere's earlier term called "algophilia"; Schrenck-Notzing's interpretation was that algolagnia involved lust, not love as Fere interpreted the phenomenon.
Algolagnia, deriving sexual pleasure and stimulation from physical pain