It's rude to attack people with a knife.
John is in the kitchen making dinner with his wife.
John wants to make a salad.
John is making a salad his wife says hes doing it wrong, so he ask her to help him.
While John is making a salad his wife starts yelling at him that hes doing it wrong so John shoves the knife in her face attacking her.
John and his wife have a nice dinner and later watch a movie.
Johns wife gets so angry and leaves she divorces him a week later.