Man's Favorite Sport? (1964) may win the award for most random premise - Rock Hudson works as a fishing expert for Abercrombie & Fitch. He gets into trouble when - BY GOLLY! - he's forced to enter a fishing tournament and Paula Prentiss's character finds out that he's never actually been fishing before!
Whattttttttttt? So ridiculous. Who heard that pitch and thought, "Now there's a movie!"
Also, while characters who fall in love too quickly (and/or easily) turn up in a huge percentage of romantic comedies, this is a really glaring example of it.
See all of the previous movie posts HERE.
