The thought of a 4 year old

As I'm waiting to go to work this morning Tyson and I have this conversation, keep in mind that Braxton is only 7 months old.

Tyson: Mommy, you need a new baby.
Me: Why?
Tyson: Cause I don't like this one (points to Braxton)
Me: Why?
Tyson: I just don't, no, you need to have another one.
Me: Why?
Tyson: Cause we need 2 babies like him (points to Braxton)
Me: I think we need to wait until Braxton gets a little older.
Tyson: Oh, Ok

Where do they come up with this stuff?