DH objects when I (occasionally) swear in front of the DC (9 and 6), eg if I break something or am explaining with emphasis about a difficult situation. For example "shit" and "I was / she was pissed off". (I don't mean "worse" words or swearing AT the DC, or at DH in front of the DC).
He even objects if I swear in discussions in the car when they are fast asleep, or in our bedroom when they are asleep in their rooms.
I think he is U and that objecting every time (eg a sharp "don't swear" or even - this evening when we were alone in our room a sharp "shhh") is controlling.
But perhaps MNetters will disagree!