This conversation took place earlier tonight while watching Planet Earth:
(My husband shall be called "Computer Guy")
Computer Guy: look MZ, it's your brother! ( points to a monkey on the tv)
MZ: No, that's not a brother.
Me: I dont think he even know what a brother is.
Computer Guy: MZ, what is a brother?
MZ: a monkey!
A short while later the narrator is telling us that the monkey we are seeing is a howler monkey.
MZ: No, it's a brother!