Our Home Economics teacher, Miss Munroe, would get the class to chant "salts and sugars are not nutritious" before the start of every lesson.
After school one evening, Miss Munroe was spied by Martin Jenkins gobbling off our sports teacher in the car-park of the local pub.
When she intoned her mantra in class the following day, Martin's reply of "what about the ones in Mr. Johnson's spunk, miss?" was enough to see her scream and run crying from the room. She didn't return to school.
A shame really, as we wanted to know if she'd gone against her own teachings by swallowing.