From the mouths of babes… (Okay, really 9-year-olds)

Me, to Peter: You’re SO funny.
Peter, to N: You see, N, she thinks I’m funny.
Me, to N: What he neglected to mention is that that was SARCASM.
N, to both of us: I think you two shouldn’t play with sarcasm. Sarcasm is a dangerous weapon, you know.