My son knows what a few bad words are and he knows that good little boys never use them and if they do they go to time out for 5 min. Well my husband was playing xbox and said a few bad words when he thought my son wasnt listening. At that moment my son flew out of his bedroom grabbed his dad's hand and said follow me. He took him to the corner and said now you stand here for 5 min then we will have a talk about your potty mouth.