I'm So Mature

I was joking around with a kid today after recess when she said,
"Whatever, Mr. Fartyface!"

To this, I ingeniously responded, "At least I'm not a Poopyface!"

The following 10-second argument ensued:

"Fartyface!"
"Poopyface!"
"Fartypoopface King!"
"Go to class."
"Fine, Mr. Poopypantsface!"

I win!