My 3.5 year old son did not want to brush his teeth last night. I explained why we had to brush our teeth but he still insisted he didn't want to. I calmly told him not to worry, we could leave his teeth (which i knew he wouldn't want to do, sometimes this works and he brushes them!). But to my surprise and shock he said "then i will cut you in half with a knife". I asked him who taught him to say that and he didn't say anything. I asked if he heard it from nursery and he said yes. I then went on to explain to him that it's not very pleasant to say that to people, it upsets me to hear that. he told me after that he was joking. I said it's ok if he's joking. Did i do/say the right thing? How would others reacted to similsr situation and what would you have said? Just like to hear everyones opinion please.