Albert Moll (German: [mɔl]; 4 May 1862, Lissa – 23 September 1939, Berlin) was a neurologist, psychologist, sexologist, and ethicist. Alongside Iwan Bloch and Magnus Hirschfeld, he is considered the founder of medical psychology and sexology. Although Moll was a pioneer of sexology, his contemporaries such as Magnus Hirschfeld and Sigmund Freud eclipsed his work, primarily due to the bitter rivalry between them. Moll accused Freud of selection bias, and Freud claimed Moll could not handle constructive criticism after their first meeting. Moll believed human sexual nature involved two entirely distinct parts: sexual stimulation and sexual attraction. Source: Wikipedia (en)