In maritime folklore, bananas on boats are bad luck

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In maritime folklore, bananas were blamed for bad luck—especially among sailors and fishermen. Some fishermen believed bananas scared away fish or that you’d catch nothing if you brought one on board.  Alternatively, black cats on boats were thought to bring good luck.  Learn more at https://www.hubbardsmarina.com/bananas-bad-luck-on-a-boat/

low angle view of trees on forest

“Knock on wood” came from the belief that spirits resided in trees and knocking would call for their protection or prevent bad luck

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“Knock on wood” came from the belief that spirits resided in trees and knocking would call for their protection or prevent bad luck. Over time, the practice evolved into a common superstition to avoid jinxing yourself after saying something.  Learn more at https://www.history.com/articles/why-do-people-knock-on-wood-for-luck