Cow Talk

My son got off the bus after school and started a rather interesting conversation.  "Moo!" he said.

I looked at him quizzically.  "Moo?"

"Moo, moo."

"Moo, moo?"

"Moo!"

"Moo?"  I shook my head.  "Bubba, what the heck are you talking about?  I can't understand a word you're saying."

"But you're the Mama Moo Moo Mama. You should've understood every word, because I was speaking your language!"

Uh, right.  Moo.