A fellow nurse at my hospital received a call from an anxious woman. "I'm diabetic and I'm afraid I've had too much sugar today," she said.
"Are you light-headed?" my colleague asked.
"No," the caller answered, "I'm a brunette."
The office I work in for the health system also houses the system's 24 hour telephone consulting nurses. I'm sure more than one of them has received a call much like that one.