Visible crew/equipment: After Lucy tells Ethel her plans for gluing on a mustache, Ethel congratulates her on the crazy idea, and in the next shot of Lucy in her bedroom just as she opens the door for Fred and Ethel, a crew member's arm moves into the shot at the right side of the screen. (00:06:15)
I Love Lucy (1951)
1 mistake in The Moustache
Starring: Lucille Ball, Desi Arnaz, Vivian Vance, William Frawley
Ricky Ricardo: What's the matter with you? Are you crazy or something?
Trivia: Fred and Ethel's bickering relationship didn't require much acting; in real life Vivian Vance and William Frawley didn't care for each other at all.
More questions & answers from I Love Lucy





Answer: There is no reason. It's a just a silly plot device, typical of the era. Women characters were often portrayed as making uninformed assumptions or decisions.
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