I had this exchange with Nathan Jr in the car last week:
Nathan Jr: Do you know Kate?
Me: Kate who?
NJ: [indignant] No! This isn't a knock-knock joke.
Me: [not laughing, no really] Okay. [maybe snickering a little]
NJ: [slowly, like I'm an idiot] Do you know Kate?
Me: [mentally ticking through all the Kates with whom I am acquainted; and they are many] Which Kate do you mean?
NJ: He's in my class at school.
Me: [Now legitimately confused. Kate's a dude?]
Bump: You mean Kate Something-Something (I'm not protecting identities here, I don't remember what he said) from school?
Me: No, I don't know her.
NJ: [getting to the damn point, already] Sometimes she calls me Nate-Nate.
Me: She does? (Awwwwww)
NJ: [sternly] Yes. And that's not appropriate.
I love that my four-year-old is exploring the concept of appropriate, something I have clearly not yet mastered. Also? It's funny to hear a four-year-old say the word "appropriate."