At some point in the early 1930s, the psychoanalyst Otto Rank gave his lover Anaïs Nin a ring that he had received from his mentor Sigmund Freud. Nin returned the favour with a ring that came from her father, with whom she had previously embarked on a sexual relationship. It gets weirder. Before handing over her father's ring to Rank, Nin commissioned a jeweller to make a copy. This duplicate she then gave to her other lover, Henry Miller.
--Kathryn Hughes, reviewing Wendy Doniger, The Ring of Truth: And Other Myths of Sex and Jewelry (Oxford University ress); review from The Times Literary Supplement (September 1, 2017), p. 11