I think I know the "F" and "S" word

So a continuation of earlier. I am on the phone relaying the conversation w/Ian earlier. Connor can hear me and says he knows the "S" word. He says it is "Shut up". I said it isn't a bad word it just isn't nice and it means I don't want to hear what you say. He then says I know the "F" word. He whispers "Is it Fart?"

Aren't innocent kids cute?