If Marta works as an engineer in the auto industry, I would assume she spends a nonzero amount of time on the factory floor– and there’s an example of a place with different rules on swearing, all over again.

There’s a big difference between being rude in your words and actions and having a realistic approach to language. Not cursing in front of kids doesn’t mean teaching them “sex was a cuss word.” I entered kindergarten not knowing how to swear, but knowing exactly how babies, puppies, tadpoles, and ducklings were made. Cursing is easy to pick up, kids don’t need the adults in their lives throwing it in their faces.