It is frowned on to curse in front of children.
Bob is watching a sports game with his wife and children close by when his team loses the game.
Bob wants to express his unhappiness with his team.
Bob shouts at the TV but uses make up words instead of the bad words he wants to use.
Bob yells at the TV using bad words not appropriate for children.
Bob's wife is happy with him for not cursing while in earshot of the children.
Bob's wife is angry with him for using curse words where his children could hear them.