What?

Conversation with my suddenly very mature boy.
" I have a girlfriend."
"You do?"
"Well, she's only my recess girlfriend."
"What's her name?"
"Hold on... not Sarah, or Madison, not Madelaine. Olivia! That's it!"
"Is she pretty?"
"Mom, I only date the pretty ones."

What! Date? How does he even know what that means?