What are the psychological roots of infidelity? How does a married couple go for years without a moment’s intimacy? And what happens when the wife’s attempt to cure her husband backfires? A reading of Kiddushin 81b, through the Bible and Midrash, Demosthenes and Rashi, Oscar Wilde and Robert Louis Stevenson, Sigmund Freud and C.J. Jung and Esther Perel.