In a dive into medical quackery, Tim Hartford, host of "Cautionary Tales," uncovers the outrageous life of John R. Brinkley, a man notorious for promoting goat testicle transplants as a remedy for virility and fertility. They explore the interplay between showmanship and ethical violations in medicine. From Brinkley's rise to fame with dubious claims to his spectacular fall from grace, the conversation reveals the bizarre consequences of desperation for health solutions and critiques the lack of regulation in early 20th-century medicine.