When biblical authors wanted to talk about genitals, they sometimes talked about “hands,” as in the Song of Solomon, and sometimes about “feet.” Coogan cites one passage in which a baby is born “between a mother’s feet”; and another, in which the prophet Isaiah promises that a punitive God will shave the hair from the Israelites’ heads, chins, and “feet.” When, in the Old Testament, Ruth anoints herself and lies down after dark next to Boaz—the man she hopes to make her husband—she “uncovers his feet.” A startled Boaz awakes. “Who are you?” he asks. Ruth identifies herself and spends the night “at his feet.”
From this, Coogan makes a rather sensationalistic exegetical move. When he is teaching to college students, he writes, someone inevitably asks about the scene in Luke, in which a woman kisses and washes Jesus’ feet—and then dries them with her hair. Is that author speaking about “feet”? Or feet?