Gracie Allen -- who played the scatterbrained wife in the famed Burns & Allen comedy duo (opposite real husband George Burns) -- once called a repairman to fix her electric clock: "There's nothing wrong with the clock," the repairman said after fiddling for a while. "You just didn't have it plugged in." "Well, I don't want to waste electricity," Gracie replied. "I only plug it in when I want to know what time it is."
Sources
L. Davidson, Wit`s Thesaurus
