Even tho he used a lot of sexual innuendos, Fleming never used four letter words.
I saw an interview of him many years ago. It was a grainy black and white film. The interview was pretty long and when the guy asked him why he never used four letter words, he at first said it was his Scottish parents but after thinking about it, he said he just didn’t like to see curse words in print.
The Bond films rarely used more than the titles of his stories.