Does This Mean Trouble Later?

Me: "What's that cord you're carrying around?"

Son: (irritated) "It's the cord for one of my consoles (for Gamecube)!"

Me: "How do you want to talk to me?"

Son: (trying unsuccessfully to sound less irritated) "It's the cord for one of my consoles."

Me: "Try talking to me nicely."

Son: (deadpan, looking in bathroom mirror) "It's the cord for one of my consooooles."

Me: (laughing) "How old are you, anyway?"

Son: (irritated again) "Four!!"

Me: "Are you sure you're not thirteen?"

Son: "Mommy, just stop being funny."

Me: (winking) "I can't help it. I'm naturally funny."

Son: (walking away) "No, you're not..."