Background
Source: Wikipedia
Iwan Bloch (8 April 1872 – 21 November 1922), also known as Ivan Bloch, was a German dermatologist, and psychiatrist, psychoanalyst born in Delmenhorst, Grand Ducal Oldenburg, Germany, and often called the first sexologist. Together with Magnus Hirschfeld and Albert Eulenburg, Bloch is known for having proposed the new concept of a science of sexuality (Sexualwissenschaft) or sexology.
