Picasso’s relationship with women—his formidable wives and muses—has been endlessly explored. But what about his relationships with men? The poet Éluard was Picasso’s best friend and the two shared interests and ideas, including their fascination with the female. “A woman is more beautiful than the world in which I live,” Éluard once said, “and so I close my eyes.” A chronologically structured, mixed-medium retrospective. —E.C.