That was another secret between her and Jack, their confidential appointments with Max Jacobson, the German physician they called Dr. Feelgood. He shot them up with all kinds of drugs: speed, steroids, painkillers, animal hormones, bone marrow, human placenta. Neither Jack nor Jackie knew what, exactly, was in Feelgood’s injections. “I don’t care if it’s horse piss,” Jack once said. “It works.”

