This frank watercolour is by the Bulgarian artist Jules Pascin (born Julius Mordecai Pincas in 1885). As a fifteen year old he made his first drawings in a brothel in Bucharest, which he frequented. He then studied art in Vienna and Munich and started to do magazine illustrations using the pseudonym Pascin (an anagram of his surname). At the age of twenty he moved to Paris but with the coming of the Great War in 1914 he left for the US where he became an American citizen. He returned to Paris after the war and led a very social life in the bars and clubs there, befriending a young Ernest Hemingway.
Like Toulouse-Lautrec and Degas he produced a number of pictures of Parisian prostitutes and we will look at more of his erotic drawings and paintings another time.