Billy Wilder wanted Tom Ewell to have an affair in The Seven Year Itch, which would only be told when a housekeeper finds an earring in the bed. The censors wouldn't allow it.
I don't think the movie would work as well if that scene had been included. It would have dampened the sunny, innocent sexiness of the rest of the movie, the sweetness of Ewell's character that Marilyn praises at the end.