Where did he learn that?

In the car tonight on the way home from school:

D: (proudly) "Bryce and I know each other's middle names."

I seize the opportunity for a little teasing...

Me: "What is your middle name?"

D: "Zachary"

Me: "What? Your name is Johnathan . Declan Johnathan..."

D: "My middle name is Zachary, you're just being facetious"


Me: "What! Where did you learn that word?"

D: "I don't know, but you were being facetious, right?"

Me: (still a little stunned) "Yep."

Trivia: Did you know that facetious is one of only two words in the English language to contain all 5 vowels in alphabetical order?