Back before World War II, the conservative Saturday Evening Post ran an article written by the wife of a billiards professional. She told how part of her job as her husband's assistant was seeing that all was in order for his exhibitions. Among her duties, she had to make sure that the billiard balls were exactly at room temperature.
The Post's makeup editor decided that a subhead was needed here, so he wrote: SHE KEEPS HIS BALLS WARM. Nearly a million copies had gone out before someone woke up.More Anguished English by Richard Lederer