Was looking up a reference for my book related to Ian Fleming's "Chitty Chitty Bang Bang," particularly the history of the real cars. This was one article I found, which included this bit:

The author Ian Fleming was inspired by the Count and his cars to write the children's novel "Chitty Chitty Bang Bang" which was made into a successful film by MGM in 1968.

Although in the film the name "Chitty Chitty Bang Bang" came from the noise the car made for the real cars it actually comes from the words to a World War I bawdy soldiers song about Officers based in France. Officers would obtain a weekend pass or "chit" so they could go to Paris to "enjoy the favours of the ladies". Hence "Chitty Bang Bang".

Thank God I didn't know this when I watched the movie with my kids when they were younger. I'd have to explain why Dad was laughing his arse off at the family in the movie singing the theme song.