The psychologist John B died at the age of 80. Here is all you want to know, and more!
Biography - A Short Wiki
Infamous for his “Little Albert” infant behavioral conditioning experiment, Watson is also notable for inventing the psychological sub-field of behaviorism.
He was forced to give up his teaching position at Johns Hopkins University when his affair with his student Rosalie Rayner was discovered. After divorcing his first wife, Mary Ickes Watson, he married Rayner.