I Myself Have Often Had Similar Thoughts.

me: What is your brother yelling about?
Older Son: Oh he wants to show me something, but I think it will be boring and so I'm not going.

But I Thought You Loved Your Brother...

Older Son: Five children is a lot to look after, isn't it mummy? I think five children would be too many.
me: Mm. What do you think would be the best number then?
Older Son (after a moment's consideration, and happily): Two!
Younger Son (loudly and abruptly): One.

Pretty Sure He Is, Yep.

Younger Son (after Older Son runs shrieking to the toilet): Is he really your child?

How Rude.

Younger Son (chanting): My name is little daddy and I got a big fat bum!
Older Son (from the other room, matter of fact tone): Yeah, daddy has got a big fat bum. Definitely.

Wonderland, Here I Come.

Older Son: Daddy wouldn't even fit in a rabbit hole. 
Me: Why's that then?
Older Son: Because he's big and fat and round!
Me: (smothered laughter) Oh, I see. 
Older Son: You are thin and not fat and tall, mummy. You would fit in a rabbit hole. So would I.